diff --git a/Xext/sync.c b/Xext/sync.c
index d0e7f95e3..d529bec49 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -448,7 +448,7 @@ SyncSendCounterNotifyEvents(ClientPtr client, SyncAwait **ppAwait,
 /* This function is called when an alarm's counter is destroyed.
  * It is plugged into pTrigger->CounterDestroyed (for alarm triggers).
  */
-void
+static void
 SyncAlarmCounterDestroyed(SyncTrigger *pTrigger)
 {
     SyncAlarm *pAlarm = (SyncAlarm *)pTrigger;