diff --git a/lib/ace/mode/behaviour/css.js b/lib/ace/mode/behaviour/css.js
index fd1f4041..1c35f744 100644
--- a/lib/ace/mode/behaviour/css.js
+++ b/lib/ace/mode/behaviour/css.js
@@ -70,11 +70,19 @@ var CssBehaviour = function () {
     this.add("colon", "deletion", function (state, action, editor, session, range) {
         var selected = session.doc.getTextRange(range);
         if (!range.isMultiLine() && selected === ':') {
-            var line = session.doc.getLine(range.start.row);
-            var rightChar = line.substring(range.end.column, range.end.column + 1);
-            if (rightChar === ';') {
-                range.end.column ++;
-                return range;
+            var cursor = editor.getCursorPosition();
+            var iterator = new TokenIterator(session, cursor.row, cursor.column);
+            var token = iterator.getCurrentToken();
+            if (token && token.value.match(/\s+/)) {
+                token = iterator.stepBackward();
+            }
+            if (token && token.type === 'support.type') {
+                var line = session.doc.getLine(range.start.row);
+                var rightChar = line.substring(range.end.column, range.end.column + 1);
+                if (rightChar === ';') {
+                    range.end.column ++;
+                    return range;
+                }
             }
         }
     });