diff --git a/os/hal/platforms/STM32/ext_lld.c b/os/hal/platforms/STM32/ext_lld.c
index 90eb2573b..d9cd22cd7 100644
--- a/os/hal/platforms/STM32/ext_lld.c
+++ b/os/hal/platforms/STM32/ext_lld.c
@@ -172,6 +172,8 @@ void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) {
 
   EXTI->IMR  &= ~(1 << channel);
   EXTI->EMR  &= ~(1 << channel);
+  EXTI->RTSR &= ~(1 << channel);
+  EXTI->FTSR &= ~(1 << channel);
   EXTI->PR    =  (1 << channel);
 }