diff --git a/resources/css/ext.uls-vector.less b/resources/css/ext.uls-vector.less
index 313c30a6..21fc814d 100644
--- a/resources/css/ext.uls-vector.less
+++ b/resources/css/ext.uls-vector.less
@@ -18,7 +18,7 @@
 
 	.uls-search-label {
 		opacity: 0.51;
-		.transition( opacity 250ms );
+		transition: opacity 250ms;
 	}
 
 	.uls-search-wrapper:hover .uls-search-label {