diff --git a/os/hal/platforms/STM32/GPIOv2/pal_lld.c b/os/hal/platforms/STM32/GPIOv2/pal_lld.c
index 641670259..91d397cdc 100644
--- a/os/hal/platforms/STM32/GPIOv2/pal_lld.c
+++ b/os/hal/platforms/STM32/GPIOv2/pal_lld.c
@@ -31,7 +31,7 @@
 /* Driver local definitions.                                                 */
 /*===========================================================================*/
 
-#if defined(STM32L1XX_MD)
+#if defined(STM32L1XX_MD) || defined(STM32L1XX_MDP) || defined(STM32L1XX_HD)
 #define AHB_EN_MASK     (RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN |          \
                          RCC_AHBENR_GPIOCEN | RCC_AHBENR_GPIODEN |          \
                          RCC_AHBENR_GPIOEEN | RCC_AHBENR_GPIOHEN)
diff --git a/os/hal/platforms/STM32/stm32.h b/os/hal/platforms/STM32/stm32.h
index 45753a6aa..1ad0691bc 100644
--- a/os/hal/platforms/STM32/stm32.h
+++ b/os/hal/platforms/STM32/stm32.h
@@ -33,6 +33,8 @@
  *          - STM32F37X for Analog & DSP devices.
  *          - STM32F4XX for High-performance STM32 F-4 devices.
  *          - STM32L1XX_MD for Ultra Low Power Medium-density devices.
+ *          - STM32L1XX_MDP for Ultra Low Power Medium-density Plus devices.
+ *          - STM32L1XX_HD for Ultra Low Power High-density devices.
  *          .
  *
  * @addtogroup HAL
@@ -66,7 +68,8 @@
       defined(STM32F427_437xx) || defined(STM32F429_439xx)
 #include "stm32f4xx.h"
 
-#elif defined(STM32L1XX_MD)
+#elif defined(STM32L1XX_MD)    || defined(STM32L1XX_MDP)   ||               \
+      defined(STM32L1XX_HD)
 #include "stm32l1xx.h"
 
 #else
diff --git a/os/hal/platforms/STM32L1xx/hal_lld.h b/os/hal/platforms/STM32L1xx/hal_lld.h
index d0649e6c9..86aa2b778 100644
--- a/os/hal/platforms/STM32L1xx/hal_lld.h
+++ b/os/hal/platforms/STM32L1xx/hal_lld.h
@@ -25,6 +25,8 @@
  *          .
  *          One of the following macros must also be defined:
  *          - STM32L1XX_MD for Ultra Low Power Medium-density devices.
+ *          - STM32L1XX_MDP for Ultra Low Power Medium-density Plus devices.
+ *          - STM32L1XX_HD for Ultra Low Power High-density devices.
  *          .
  *
  * @addtogroup HAL
@@ -49,7 +51,21 @@
  * @name    Platform identification
  * @{
  */
+#if defined(STM32L1XX_MD) || defined(__DOXYGEN__)
 #define PLATFORM_NAME           "STM32L1xx Ultra Low Power Medium Density"
+#define STM32L1XX
+
+#elif defined(STM32L1XX_MDP)
+#define PLATFORM_NAME           "STM32L1xx Ultra Low Power Medium Density Plus"
+#define STM32L1XX
+
+#elif defined(STM32L1XX_HD)
+#define PLATFORM_NAME           "STM32L1xx Ultra Low Power High Density"
+#define STM32L1XX
+
+#else
+#error "STM32L1xx device not specified"
+#endif
 /** @} */
 
 /**
diff --git a/readme.txt b/readme.txt
index 209be1953..6a5a2ca06 100644
--- a/readme.txt
+++ b/readme.txt
@@ -89,6 +89,7 @@
 *****************************************************************************
 
 *** 2.7.0 ***
+- FIX: Fixed STM32L1 Plus Compilation Problems (bug #484)(backported to 2.6.4).
 - FIX: Fixed OTG HS failure when WFI instruction is enabled (bug #482)
   (backported to 2.6.4).
 - FIX: Fixed wrong STM32F4 TIM6 vector number symbol (bug #480)