diff --git a/calendar/inc/class.calendar_merge.inc.php b/calendar/inc/class.calendar_merge.inc.php
index 1b64c5677d..69f8031ee7 100644
--- a/calendar/inc/class.calendar_merge.inc.php
+++ b/calendar/inc/class.calendar_merge.inc.php
@@ -585,7 +585,8 @@ class calendar_merge extends Api\Storage\Merge
 	 * Validate and properly format a list of 'ID's into either a list of ranges
 	 * or a list of IDs, depending on what the template needs.  Templates using
 	 * the range placeholder need a list of date ranges, templates using pagerepeat
-	 * need a list of individual events.
+	 * need a list of individual events.  Templates using neither get just the
+	 * first ID
 	 *
 	 * @param Array[]|String[] $ids List of IDs, which can be a list of individual
 	 *	event IDs, entire events, a date range (start & end) or a list of date ranges.
@@ -638,6 +639,10 @@ class calendar_merge extends Api\Storage\Merge
 				}
 			}
 		}
+		else
+		{
+			$validated_ids[] = $this->normalize_event_id(array_shift($ids));
+		}
 
 		return $validated_ids;
 	}