diff --git a/targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_conf.h b/targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_conf.h
index b157dc88ee..364c00cbe7 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_conf.h
+++ b/targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_conf.h
@@ -132,7 +132,7 @@
   * @brief Internal Low Speed oscillator (LSI) value.
   */
 #if !defined  (LSI_VALUE)
- #define LSI_VALUE  ((uint32_t)37000U)       /*!< LSI Typical Value in Hz*/
+ #define LSI_VALUE  (37000U)       /*!< LSI Typical Value in Hz*/
 #endif /* LSI_VALUE */                      /*!< Value of the Internal Low Speed oscillator in Hz
                                              The real value may vary depending on the variations
                                              in voltage and temperature.*/
diff --git a/targets/TARGET_STM/TARGET_STM32L4/device/stm32l4xx_hal_conf.h b/targets/TARGET_STM/TARGET_STM32L4/device/stm32l4xx_hal_conf.h
index 5ad54eb713..ae27ce2da1 100644
--- a/targets/TARGET_STM/TARGET_STM32L4/device/stm32l4xx_hal_conf.h
+++ b/targets/TARGET_STM/TARGET_STM32L4/device/stm32l4xx_hal_conf.h
@@ -148,7 +148,7 @@
   * @brief Internal Low Speed oscillator (LSI) value.
   */
 #if !defined  (LSI_VALUE) 
-  #define LSI_VALUE  ((uint32_t)32000U)      /*!< LSI Typical Value in Hz*/
+  #define LSI_VALUE  (32000U)      /*!< LSI Typical Value in Hz*/
 #endif /* LSI_VALUE */                       /*!< Value of the Internal Low Speed oscillator in Hz
                                               The real value may vary depending on the variations
                                               in voltage and temperature.*/