diff --git a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/gpio_object.h b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/gpio_object.h
index 75013b4188..d731d97d05 100644
--- a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/gpio_object.h
+++ b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/gpio_object.h
@@ -43,9 +43,9 @@ extern "C" {
 typedef struct {
     PinName  pin;
     uint32_t mask;
-    __IO uint16_t *reg_in;
+    __IO uint32_t *reg_in;
     __IO uint32_t *reg_set;
-    __IO uint16_t *reg_clr;
+    __IO uint32_t *reg_clr;
 } gpio_t;
 
 static inline void gpio_write(gpio_t *obj, int value) {
diff --git a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/objects.h b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/objects.h
index b5065b6066..cb55880918 100644
--- a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/objects.h
+++ b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/objects.h
@@ -50,8 +50,8 @@ struct port_s {
     PortName port;
     uint32_t mask;
     PinDirection direction;
-    __IO uint16_t *reg_in;
-    __IO uint16_t *reg_out;
+    __IO uint32_t *reg_in;
+    __IO uint32_t *reg_out;
 };
 
 struct analogin_s {