Index: includes/parser/Parser.php
===================================================================
--- includes/parser/Parser.php	(revision 51213)
+++ includes/parser/Parser.php	(working copy)
@@ -3493,6 +3493,7 @@
 								break;
 							}
 						}
+						if( $i == 0 ) $toclevel = 1;
 					}
 					if( $toclevel<$wgMaxTocLevel ) {
 						if($prevtoclevel < $wgMaxTocLevel) {