diff --git a/event.c b/event.c
index 1173d037..1496e2be 100644
--- a/event.c
+++ b/event.c
@@ -333,7 +333,7 @@ detect_monotonic(void)
 
 /* How often (in seconds) do we check for changes in wall clock time relative
  * to monotonic time?  Set this to -1 for 'never.' */
-#define CLOCK_SYNC_INTERVAL -1
+#define CLOCK_SYNC_INTERVAL 5
 
 /** Set 'tp' to the current time according to 'base'.  We must hold the lock
  * on 'base'.  If there is a cached time, return it.  Otherwise, use