diff --git a/demos/autocomplete/combobox.html b/demos/autocomplete/combobox.html
index 9f92ae10893..37bb0c179ee 100644
--- a/demos/autocomplete/combobox.html
+++ b/demos/autocomplete/combobox.html
@@ -82,7 +82,7 @@
 						.appendTo( ul );
 				};
 
-				this.button = $( "<button>&nbsp;</button>" )
+				this.button = $( "<button type='button'>&nbsp;</button>" )
 					.attr( "tabIndex", -1 )
 					.attr( "title", "Show All Items" )
 					.insertAfter( input )