diff --git a/os/hal/include/pal.h b/os/hal/include/pal.h
index 7a2041974..e9d0e31d8 100644
--- a/os/hal/include/pal.h
+++ b/os/hal/include/pal.h
@@ -263,9 +263,8 @@ typedef struct {
  * @api
  */
 #if !defined(pal_lld_setport) || defined(__DOXYGEN__)
-#define palSetPort(port, bits) {                                        \
-  palWritePort(port, palReadLatch(port) | (bits));                      \
-}
+#define palSetPort(port, bits)                                          \
+  palWritePort(port, palReadLatch(port) | (bits))
 #else
 #define palSetPort(port, bits) pal_lld_setport(port, bits)
 #endif
@@ -286,9 +285,8 @@ typedef struct {
  * @api
  */
 #if !defined(pal_lld_clearport) || defined(__DOXYGEN__)
-#define palClearPort(port, bits) {                                      \
-  palWritePort(port, palReadLatch(port) & ~(bits));                     \
-}
+#define palClearPort(port, bits)                                        \
+  palWritePort(port, palReadLatch(port) & ~(bits))
 #else
 #define palClearPort(port, bits) pal_lld_clearport(port, bits)
 #endif
@@ -309,9 +307,8 @@ typedef struct {
  * @api
  */
 #if !defined(pal_lld_toggleport) || defined(__DOXYGEN__)
-#define palTogglePort(port, bits) {                                     \
-  palWritePort(port, palReadLatch(port) ^ (bits));                      \
-}
+#define palTogglePort(port, bits)                                       \
+  palWritePort(port, palReadLatch(port) ^ (bits))
 #else
 #define palTogglePort(port, bits) pal_lld_toggleport(port, bits)
 #endif
@@ -347,10 +344,9 @@ typedef struct {
  * @api
  */
 #if !defined(pal_lld_writegroup) || defined(__DOXYGEN__)
-#define palWriteGroup(port, mask, offset, bits) {                       \
+#define palWriteGroup(port, mask, offset, bits)                         \
   palWritePort(port, (palReadLatch(port) & ~((mask) << (offset))) |     \
-                     (((bits) & (mask)) << (offset)));                  \
-}
+                     (((bits) & (mask)) << (offset)))
 #else
 #define palWriteGroup(port, mask, offset, bits)                         \
   pal_lld_writegroup(port, mask, offset, bits)
@@ -416,10 +412,9 @@ typedef struct {
  * @api
  */
 #if !defined(pal_lld_writepad) || defined(__DOXYGEN__)
-#define palWritePad(port, pad, bit) {                                   \
+#define palWritePad(port, pad, bit)                                     \
   palWritePort(port, (palReadLatch(port) & ~PAL_PORT_BIT(pad)) |        \
-                     (((bit) & 1) << pad));                             \
-}
+                     (((bit) & 1) << pad))
 #else
 #define palWritePad(port, pad, bit) pal_lld_writepad(port, pad, bit)
 #endif
diff --git a/os/hal/platforms/AT91SAM7/pal_lld.h b/os/hal/platforms/AT91SAM7/pal_lld.h
index ebb22f2cb..9c5796a40 100644
--- a/os/hal/platforms/AT91SAM7/pal_lld.h
+++ b/os/hal/platforms/AT91SAM7/pal_lld.h
@@ -155,9 +155,7 @@ typedef AT91PS_PIO ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_writeport(port, bits) {                                 \
-  (port)->PIO_ODSR = (bits);                                            \
-}
+#define pal_lld_writeport(port, bits) ((port)->PIO_ODSR = (bits))
 
 /**
  * @brief   Sets a bits mask on a I/O port.
@@ -169,9 +167,7 @@ typedef AT91PS_PIO ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_setport(port, bits) {                                   \
-  (port)->PIO_SODR = (bits);                                            \
-}
+#define pal_lld_setport(port, bits) ((port)->PIO_SODR = (bits))
 
 /**
  * @brief   Clears a bits mask on a I/O port.
@@ -183,9 +179,7 @@ typedef AT91PS_PIO ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_clearport(port, bits) {                                 \
-  (port)->PIO_CODR = (bits);                                            \
-}
+#define pal_lld_clearport(port, bits) ((port)->PIO_CODR = (bits))
 
 /**
  * @brief   Writes a group of bits.
@@ -201,11 +195,10 @@ typedef AT91PS_PIO ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_writegroup(port, mask, offset, bits) {                  \
-  (port)->PIO_OWER = (mask) << (offset);                                \
-  (port)->PIO_ODSR = (bits) << (offset);                                \
-  (port)->PIO_OWDR = (mask) << (offset);                                \
-}
+#define pal_lld_writegroup(port, mask, offset, bits)                    \
+  ((port)->PIO_OWER = (mask) << (offset),                               \
+   (port)->PIO_ODSR = (bits) << (offset),                               \
+   (port)->PIO_OWDR = (mask) << (offset))
 
 /**
  * @brief   Pads group mode setup.
diff --git a/os/hal/platforms/LPC214x/pal_lld.h b/os/hal/platforms/LPC214x/pal_lld.h
index 424cb73f1..1a45cd6a9 100644
--- a/os/hal/platforms/LPC214x/pal_lld.h
+++ b/os/hal/platforms/LPC214x/pal_lld.h
@@ -194,11 +194,10 @@ typedef FIO * ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_writegroup(port, mask, offset, bits) {                  \
-  (port)->FIO_MASK = ~((mask) << (offset));                             \
-  (port)->FIO_PIN = (bits) << (offset);                                 \
-  (port)->FIO_MASK = 0;                                                 \
-}
+#define pal_lld_writegroup(port, mask, offset, bits)                    \
+  ((port)->FIO_MASK = ~((mask) << (offset)),                            \
+   (port)->FIO_PIN = (bits) << (offset),                                \
+   (port)->FIO_MASK = 0)
 
 /**
  * @brief   Pads group mode setup.
@@ -236,9 +235,7 @@ typedef FIO * ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_lpc214x_set_direction(port, dir) {                      \
-  (port)->FIO_DIR = (dir);                                              \
-}
+#define pal_lld_lpc214x_set_direction(port, dir) ((port)->FIO_DIR = (dir))
 
 extern const PALConfig pal_default_config;
 
diff --git a/os/hal/platforms/MSP430/pal_lld.h b/os/hal/platforms/MSP430/pal_lld.h
index 7741e8f12..31ee669a0 100644
--- a/os/hal/platforms/MSP430/pal_lld.h
+++ b/os/hal/platforms/MSP430/pal_lld.h
@@ -255,9 +255,7 @@ typedef msp430_ioport_t *ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_writeport(port, bits) {                                 \
-  (port)->iop_common.out.reg_p = (bits);                                \
-}
+#define pal_lld_writeport(port, bits) ((port)->iop_common.out.reg_p = (bits))
 
 /**
  * @brief   Pads group mode setup.
diff --git a/os/hal/platforms/Posix/pal_lld.h b/os/hal/platforms/Posix/pal_lld.h
index edfa73c73..1984c06f0 100644
--- a/os/hal/platforms/Posix/pal_lld.h
+++ b/os/hal/platforms/Posix/pal_lld.h
@@ -129,10 +129,9 @@ typedef sim_vio_port_t *ioportid_t;
  *
  * @param[in] config    architecture-dependent ports configuration
  */
-#define pal_lld_init(config) {                                              \
-  vio_port_1 = (config)->VP1Data;                                           \
-  vio_port_2 = (config)->VP2Data;                                           \
-}
+#define pal_lld_init(config)                                                \
+  (vio_port_1 = (config)->VP1Data,                                          \
+   vio_port_2 = (config)->VP2Data)
 
 /**
  * @brief   Reads the physical I/O port states.
@@ -178,7 +177,7 @@ typedef sim_vio_port_t *ioportid_t;
  * @param[in] mask      group mask
  * @param[in] mode      group mode
  */
-#define pal_lld_setgroupmode(port, mask, mode) \
+#define pal_lld_setgroupmode(port, mask, mode)                              \
   _pal_lld_setgroupmode(port, mask, mode)
 
 #if !defined(__DOXYGEN__)
diff --git a/os/hal/platforms/STM32/pal_lld.h b/os/hal/platforms/STM32/pal_lld.h
index 0ecde182d..2919c91f6 100644
--- a/os/hal/platforms/STM32/pal_lld.h
+++ b/os/hal/platforms/STM32/pal_lld.h
@@ -279,10 +279,9 @@ typedef GPIO_TypeDef * ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_writegroup(port, mask, offset, bits) {                      \
-  (port)->BSRR = ((~(bits) & (mask)) << (16 + (offset))) |                  \
-                 (((bits) & (mask)) << (offset));                           \
-}
+#define pal_lld_writegroup(port, mask, offset, bits)                        \
+  ((port)->BSRR = ((~(bits) & (mask)) << (16 + (offset))) |                 \
+                 (((bits) & (mask)) << (offset)))
 
 /**
  * @brief   Pads group mode setup.
diff --git a/os/hal/platforms/STM8L/pal_lld.h b/os/hal/platforms/STM8L/pal_lld.h
index da698ea7a..f42973218 100644
--- a/os/hal/platforms/STM8L/pal_lld.h
+++ b/os/hal/platforms/STM8L/pal_lld.h
@@ -175,7 +175,7 @@ typedef GPIO_TypeDef *ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_init(config)    *IOPORTS = *(config)
+#define pal_lld_init(config) (*IOPORTS = *(config))
 
 /**
  * @brief   Reads the physical I/O port states.
@@ -215,7 +215,6 @@ typedef GPIO_TypeDef *ioportid_t;
  */
 #define pal_lld_writeport(port, bits) ((port)->ODR = (bits))
 
-
 /**
  * @brief   Pads group mode setup.
  * @details This function programs a pads group belonging to the same port
@@ -231,7 +230,7 @@ typedef GPIO_TypeDef *ioportid_t;
  * @notapi
  */
 #define pal_lld_setgroupmode(port, mask, mode)                              \
-    _pal_lld_setgroupmode(port, mask, mode)
+  _pal_lld_setgroupmode(port, mask, mode)
 
 extern ROMCONST PALConfig pal_default_config;
 
diff --git a/os/hal/platforms/STM8S/pal_lld.h b/os/hal/platforms/STM8S/pal_lld.h
index 8bb1caae8..ef69d1379 100644
--- a/os/hal/platforms/STM8S/pal_lld.h
+++ b/os/hal/platforms/STM8S/pal_lld.h
@@ -160,7 +160,7 @@ typedef GPIO_TypeDef *ioportid_t;
  *
  * @notapi
  */
-#define pal_lld_init(config)    *IOPORTS = *(config)
+#define pal_lld_init(config) (*IOPORTS = *(config))
 
 /**
  * @brief   Reads the physical I/O port states.
@@ -200,7 +200,6 @@ typedef GPIO_TypeDef *ioportid_t;
  */
 #define pal_lld_writeport(port, bits) ((port)->ODR = (bits))
 
-
 /**
  * @brief   Pads group mode setup.
  * @details This function programs a pads group belonging to the same port
@@ -216,7 +215,7 @@ typedef GPIO_TypeDef *ioportid_t;
  * @notapi
  */
 #define pal_lld_setgroupmode(port, mask, mode)                              \
-    _pal_lld_setgroupmode(port, mask, mode)
+  _pal_lld_setgroupmode(port, mask, mode)
 
 extern ROMCONST PALConfig pal_default_config;
 
diff --git a/os/hal/platforms/Win32/pal_lld.h b/os/hal/platforms/Win32/pal_lld.h
index f89510f76..a1c84b13a 100644
--- a/os/hal/platforms/Win32/pal_lld.h
+++ b/os/hal/platforms/Win32/pal_lld.h
@@ -129,10 +129,9 @@ typedef sim_vio_port_t *ioportid_t;
  *
  * @param[in] config    architecture-dependent ports configuration
  */
-#define pal_lld_init(config) {                                              \
-  vio_port_1 = (config)->VP1Data;                                           \
-  vio_port_2 = (config)->VP2Data;                                           \
-}
+#define pal_lld_init(config)                                                \
+  (vio_port_1 = (config)->VP1Data,                                          \
+   vio_port_2 = (config)->VP2Data)
 
 /**
  * @brief   Reads the physical I/O port states.
@@ -178,7 +177,7 @@ typedef sim_vio_port_t *ioportid_t;
  * @param[in] mask      group mask
  * @param[in] mode      group mode
  */
-#define pal_lld_setgroupmode(port, mask, mode) \
+#define pal_lld_setgroupmode(port, mask, mode)                              \
   _pal_lld_setgroupmode(port, mask, mode)
 
 #if !defined(__DOXYGEN__)
diff --git a/readme.txt b/readme.txt
index 775279bbb..8f7ab034b 100644
--- a/readme.txt
+++ b/readme.txt
@@ -96,6 +96,8 @@
 - NEW: Added board files for the Olimex STM32-P107.
 - NEW: Improved setup packets handling in the USB driver through a specific
   callback.
+- NEW: Improvements to the PAL driver and various implementation in order
+  to make them more parenthesis friendly.
 - OPT: Simplified Serial over USB driver configuration.
 - CHANGE: Renamed the demo ARMCM3-STM32F107-GCC in ARMCM3-STM32F107 and added
   IAR and Keil projects.