Index: includes/parser/CoreParserFunctions.php
===================================================================
--- includes/parser/CoreParserFunctions.php	(revision 41835)
+++ includes/parser/CoreParserFunctions.php	(working copy)
@@ -342,8 +344,8 @@
 		$file = wfFindFile( $name );
 		if( $file ) {
 			$url = $file->getFullUrl();
-			if( $option == 'nowiki' ) {
-				return "<nowiki>$url</nowiki>";
+			if ($option == 'nowiki') {
+				return array( $url, 'nowiki' => true );
 			}
 			return $url;
 		} else {