diff --git a/dev/js/src/match.js b/dev/js/src/match.js
index 235aabb..3827af1 100644
--- a/dev/js/src/match.js
+++ b/dev/js/src/match.js
@@ -197,7 +197,7 @@
 
         // Temporary
         var ops = document.createElement('div');
-        ops.classList.add('action', 'bottom', 'hui');
+        ops.classList.add('action', 'bottom', 'button-group');
 
         var meta = document.createElement('span');
         ops.appendChild(meta);
diff --git a/dev/js/src/match/reference.js b/dev/js/src/match/reference.js
index 41d40af..20f0137 100644
--- a/dev/js/src/match/reference.js
+++ b/dev/js/src/match/reference.js
@@ -1,4 +1,6 @@
-/*
+define(['util'], function () {
+
+  /*
   author, editor title, subTitle textSigle
   in corpusAuthor (corpusEditor), corpusTitle, corpusSubTitle, corpusSigle
   in docAuthor    (docEditor),    docTitle,    docSubTitle,    docSigle
@@ -22,7 +24,6 @@
   biblEditionStatement
   fileEditionStatement
 */
-define(['util'], function () {
 
   // Localization values
   var loc   = KorAP.Locale;
diff --git a/dev/js/src/vc/operators.js b/dev/js/src/vc/operators.js
index 91f009f..41ab744 100644
--- a/dev/js/src/vc/operators.js
+++ b/dev/js/src/vc/operators.js
@@ -138,7 +138,7 @@
 	return this._element;
 
       this._element = document.createElement('div');
-      this._element.setAttribute('class', 'operators');
+      this._element.classList.add('operators', 'button-group');
 
       // Init elements
       this.update();