diff --git a/src/backend/utils/activity/generate-wait_event_types.pl b/src/backend/utils/activity/generate-wait_event_types.pl
index 1602a40c42..6d1a2af42a 100644
--- a/src/backend/utils/activity/generate-wait_event_types.pl
+++ b/src/backend/utils/activity/generate-wait_event_types.pl
@@ -185,7 +185,7 @@ if ($gen_code)
 		printf $c "}\n\n";
 	}
 
-	printf $h "#endif                          /* WAIT_EVENT_TYPES_H */";
+	printf $h "#endif                          /* WAIT_EVENT_TYPES_H */\n";
 	close $h;
 	close $c;