diff --git a/os/hal/ports/STM32/STM32L4xx/stm32_registry.h b/os/hal/ports/STM32/STM32L4xx/stm32_registry.h
index 8f0fb1e06..d9d8ee9c4 100644
--- a/os/hal/ports/STM32/STM32L4xx/stm32_registry.h
+++ b/os/hal/ports/STM32/STM32L4xx/stm32_registry.h
@@ -368,6 +368,8 @@
 #define STM32_GPIO_EN_MASK                  (RCC_AHB2ENR_GPIOAEN |          \
                                              RCC_AHB2ENR_GPIOBEN |          \
                                              RCC_AHB2ENR_GPIOCEN |          \
+                                             RCC_AHB2ENR_GPIODEN |          \
+                                             RCC_AHB2ENR_GPIOEEN |          \
                                              RCC_AHB2ENR_GPIOHEN)
 
 /* I2C attributes.*/
diff --git a/readme.txt b/readme.txt
index 759ffaded..ccbd29d4e 100644
--- a/readme.txt
+++ b/readme.txt
@@ -82,6 +82,8 @@
 - NEW: Improved boost settings for STM32G4.
 - NEW: Files mcuconf.h for STM32F746, F767, L432, L452, L476, L496 received
        the missing setting STM32_WSPI_QUADSPI1_PRESCALER_VALUE.
+- FIX: Fixed problem with RC initialization mask of the GPIO for the 
+       STM32L4x3 (bug #1174).
 - FIX: Fixed problem with N25Q driver (bug #1173).       
 - FIX: Fixed missing constant in ADuCM36x hal_lld.c (bug #1166).
 - FIX: Fixed invalid STM32 TIM21/TIM22 debug freeze setting (bug #1164).