diff --git a/src/mgos_gpio.c b/src/mgos_gpio.c
index b31e182e8..4700b6d70 100644
--- a/src/mgos_gpio.c
+++ b/src/mgos_gpio.c
@@ -111,7 +111,8 @@ static void mgos_gpio_int_cb(void *arg) {
       mgos_runlock(s_lock);
       s->cb(pin, s->cb_arg);
       mgos_rlock(s_lock);
-      s->cnt--;
+      if(s->cnt > 0)
+        s->cnt--;
     }
   } else {
     if (s->button.timer_id == MGOS_INVALID_TIMER_ID) {