diff --git a/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.c b/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.c
index bc3f599a4..390f00fdd 100644
--- a/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.c
+++ b/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.c
@@ -345,6 +345,7 @@ void ext_lld_exti_irq_enable(void) {
   nvicEnableVector(OTG_HS_WKUP_IRQn, STM32_EXT_EXTI20_IRQ_PRIORITY);
   nvicEnableVector(TAMP_STAMP_IRQn, STM32_EXT_EXTI21_IRQ_PRIORITY);
   nvicEnableVector(RTC_WKUP_IRQn, STM32_EXT_EXTI22_IRQ_PRIORITY);
+  nvicEnableVector(LPTIM1_IRQn, STM32_EXT_EXTI23_IRQ_PRIORITY);
 }
 
 /**
@@ -368,6 +369,7 @@ void ext_lld_exti_irq_disable(void) {
   nvicDisableVector(OTG_HS_WKUP_IRQn);
   nvicDisableVector(TAMP_STAMP_IRQn);
   nvicDisableVector(RTC_WKUP_IRQn);
+  nvicDisableVector(LPTIM1_IRQn);
 }
 
 #endif /* HAL_USE_EXT */
diff --git a/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.h b/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.h
index 5c33f5f83..5094be774 100644
--- a/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.h
+++ b/os/hal/ports/STM32/STM32F7xx/ext_lld_isr.h
@@ -136,6 +136,13 @@
 #if !defined(STM32_EXT_EXTI22_IRQ_PRIORITY) || defined(__DOXYGEN__)
 #define STM32_EXT_EXTI22_IRQ_PRIORITY       6
 #endif
+
+/**
+ * @brief   EXTI23 interrupt priority level setting.
+ */
+#if !defined(STM32_EXT_EXTI23_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define STM32_EXT_EXTI23_IRQ_PRIORITY       6
+#endif
 /** @} */
 
 /*===========================================================================*/
diff --git a/os/hal/ports/STM32/STM32F7xx/stm32_registry.h b/os/hal/ports/STM32/STM32F7xx/stm32_registry.h
index 197012490..c119308b6 100644
--- a/os/hal/ports/STM32/STM32F7xx/stm32_registry.h
+++ b/os/hal/ports/STM32/STM32F7xx/stm32_registry.h
@@ -145,7 +145,7 @@
 
 /* EXTI attributes.*/
 #define STM32_EXTI_NUM_LINES                24
-#define STM32_EXTI_IMR_MASK                 0
+#define STM32_EXTI_IMR_MASK                 0xFF000000
 
 /* GPIO attributes.*/
 #define STM32_HAS_GPIOA                     TRUE