diff --git a/os/hal/platforms/STM32F4xx/ext_lld_isr.c b/os/hal/platforms/STM32F4xx/ext_lld_isr.c
index 620d7370d..64731b4c4 100644
--- a/os/hal/platforms/STM32F4xx/ext_lld_isr.c
+++ b/os/hal/platforms/STM32F4xx/ext_lld_isr.c
@@ -269,7 +269,7 @@ CH_IRQ_HANDLER(TAMPER_STAMP_IRQHandler) {
 
   CH_IRQ_EPILOGUE();
 }
-#endif /* defined(STM32F401xx) */
+#endif /* !defined(STM32F401xx) */
 
 /**
  * @brief   EXTI[22] interrupt handler (RTC_WKUP).
@@ -324,7 +324,7 @@ void ext_lld_exti_irq_enable(void) {
                    CORTEX_PRIORITY_MASK(STM32_EXT_EXTI20_IRQ_PRIORITY));
   nvicEnableVector(TAMP_STAMP_IRQn,
                    CORTEX_PRIORITY_MASK(STM32_EXT_EXTI21_IRQ_PRIORITY));
-#endif /* defined(STM32F401xx) */
+#endif /* !defined(STM32F401xx) */
   nvicEnableVector(RTC_WKUP_IRQn,
                    CORTEX_PRIORITY_MASK(STM32_EXT_EXTI22_IRQ_PRIORITY));
 }
@@ -350,7 +350,7 @@ void ext_lld_exti_irq_disable(void) {
 #if !defined(STM32F401xx)
   nvicDisableVector(OTG_HS_WKUP_IRQn);
   nvicDisableVector(TAMP_STAMP_IRQn);
-#endif /* defined(STM32F401xx) */
+#endif /* !defined(STM32F401xx) */
   nvicDisableVector(RTC_WKUP_IRQn);
 }