diff --git a/arch/arm/src/stm32/chip/stm32_pwr.h b/arch/arm/src/stm32/chip/stm32_pwr.h
index 3cbf8524640..e67f81112ba 100644
--- a/arch/arm/src/stm32/chip/stm32_pwr.h
+++ b/arch/arm/src/stm32/chip/stm32_pwr.h
@@ -166,8 +166,8 @@
 
 #if defined(CONFIG_STM32_STM32F427) || defined(CONFIG_STM32_STM32F429) || \
     defined(CONFIG_STM32_STM32F446) || defined(CONFIG_STM32_STM32F469)
-#  define PWR_CSR_ODRDY        (1 << 16) /* Over Drive generator ready */
-#  define PWR_CSR_ODSWRDY      (1 << 17) /* Over Drive Switch ready */
+#  define PWR_CSR_ODRDY        (1 << 16) /* Git 16: Over Drive generator ready */
+#  define PWR_CSR_ODSWRDY      (1 << 17) /* Bit 17: Over Drive Switch ready */
 #endif
 
 #endif /* __ARCH_ARM_SRC_STM32_CHIP_STM32_PWR_H */
diff --git a/arch/arm/src/stm32/stm32_pwr.c b/arch/arm/src/stm32/stm32_pwr.c
index f99dc0636aa..ca08ccf7c87 100644
--- a/arch/arm/src/stm32/stm32_pwr.c
+++ b/arch/arm/src/stm32/stm32_pwr.c
@@ -105,12 +105,6 @@ static inline void stm32_pwr_modifyreg32(uint8_t offset, uint32_t clearbits,
   modifyreg32(STM32_PWR_BASE + (uint32_t)offset, clearbits, setbits);
 }
 
-static inline void stm32_pwr_modifyreg16(uint8_t offset, uint32_t clearbits,
-                                         uint32_t setbits)
-{
-  modifyreg16(STM32_PWR_BASE + (uint32_t)offset, clearbits, setbits);
-}
-
 /************************************************************************************
  * Public Functions
  ************************************************************************************/
@@ -314,13 +308,13 @@ int stm32_pwr_enablewkup(enum stm32_pwr_wupin_e wupin, bool wupon)
     {
       /* Enable the wakeup pin by setting the bit in the CSR. */
 
-      stm32_pwr_modifyreg16(STM32_PWR_CSR_OFFSET, 0, pinmask);
+      stm32_pwr_modifyreg32(STM32_PWR_CSR_OFFSET, 0, pinmask);
     }
   else
     {
       /* Disable the wakeup pin by clearing the bit in the CSR. */
 
-      stm32_pwr_modifyreg16(STM32_PWR_CSR_OFFSET, pinmask, 0);
+      stm32_pwr_modifyreg32(STM32_PWR_CSR_OFFSET, pinmask, 0);
     }
 
   return OK;