diff --git a/src/event/event_epoll.c b/src/event/event_epoll.c
index f31d13ee0..b7fe8379b 100644
--- a/src/event/event_epoll.c
+++ b/src/event/event_epoll.c
@@ -89,7 +89,9 @@ DISPATCH_ALWAYS_INLINE
 static inline uint32_t
 _dispatch_muxnote_armed_events(dispatch_muxnote_t dmn)
 {
-	return dmn->dmn_events & ~dmn->dmn_disarmed_events;
+  uint32_t events = dmn->dmn_events;
+  uint16_t disarmed_events = dmn->dmn_disarmed_events;
+  return events & ~(uint32_t)disarmed_events;
 }
 
 DISPATCH_ALWAYS_INLINE