diff --git a/resources/js/ext.uls.init.js b/resources/js/ext.uls.init.js
index d1bf8841..344662a5 100644
--- a/resources/js/ext.uls.init.js
+++ b/resources/js/ext.uls.init.js
@@ -224,6 +224,12 @@
 			'msie': [['<=', 7]]
 		};
 
+		// jquery.client changed in MediaWiki 1.22.
+		// FIXME: Remove when ULS minimum MW version is 1.22.
+		if ( parseInt( mw.config.get( 'wgVersion' ).split( '.' )[1], '10' ) < 22 ) {
+			return !/MSIE [67]/i.test( navigator.userAgent );
+		}
+
 		return !$.client.test( blacklist, null, true );
 	}