diff --git a/roles/mediawiki/files/fedmsg-emit.php b/roles/mediawiki/files/fedmsg-emit.php
index 846d28e8aa..cda0b0e83f 100644
--- a/roles/mediawiki/files/fedmsg-emit.php
+++ b/roles/mediawiki/files/fedmsg-emit.php
@@ -205,8 +205,8 @@ function article_save(
   &$flags,
   $revision,
   &$status,
-  $baseRevId=0,
-  $undidRevId
+  $baseRevId,
+  $undidRevId=0
 ) {
 
   # If for some reason or another we can't create our socket, then bail.