diff --git a/inc/RRule.php b/inc/RRule.php
index 7819a343..270df21f 100644
--- a/inc/RRule.php
+++ b/inc/RRule.php
@@ -1260,6 +1260,8 @@ function expand_event_instances( vComponent $vResource, $range_start = null, $ra
       }
       else {
         unset($instances[$recur_utc]);
+        // This is a single instance of a recurring event, it can not in itself produce extra instances due to RRULE etc
+        continue;
       }
     }
     else if ( DEBUG_RRULE ) {