diff --git a/lib/ace/mode/behaviour/cstyle.js b/lib/ace/mode/behaviour/cstyle.js
index 76e12fc3..8397e79c 100644
--- a/lib/ace/mode/behaviour/cstyle.js
+++ b/lib/ace/mode/behaviour/cstyle.js
@@ -88,8 +88,6 @@ var CstyleBehaviour = function () {
 
     this.add("braces", "insertion", function (state, action, editor, session, text) {
         if (text == '{') {
-            if (!CstyleBehaviour.isSaneInsertion(editor, session))
-                return;
             var selection = editor.getSelectionRange();
             var selected = session.doc.getTextRange(selection);
             if (selected !== "" && selected !== "{") {
@@ -97,7 +95,7 @@ var CstyleBehaviour = function () {
                     text: '{' + selected + '}',
                     selection: false
                 };
-            } else {
+            } else if (CstyleBehaviour.isSaneInsertion(editor, session)) {
                 CstyleBehaviour.recordAutoInsert(editor, session, "}");
                 return {
                     text: '{}',
@@ -152,8 +150,6 @@ var CstyleBehaviour = function () {
 
     this.add("parens", "insertion", function (state, action, editor, session, text) {
         if (text == '(') {
-            if (!CstyleBehaviour.isSaneInsertion(editor, session))
-                return;
             var selection = editor.getSelectionRange();
             var selected = session.doc.getTextRange(selection);
             if (selected !== "") {
@@ -161,7 +157,7 @@ var CstyleBehaviour = function () {
                     text: '(' + selected + ')',
                     selection: false
                 };
-            } else {
+            } else if (CstyleBehaviour.isSaneInsertion(editor, session)) {
                 CstyleBehaviour.recordAutoInsert(editor, session, ")");
                 return {
                     text: '()',
@@ -199,8 +195,6 @@ var CstyleBehaviour = function () {
 
     this.add("brackets", "insertion", function (state, action, editor, session, text) {
         if (text == '[') {
-            if (!CstyleBehaviour.isSaneInsertion(editor, session))
-                return;
             var selection = editor.getSelectionRange();
             var selected = session.doc.getTextRange(selection);
             if (selected !== "") {
@@ -208,7 +202,7 @@ var CstyleBehaviour = function () {
                     text: '[' + selected + ']',
                     selection: false
                 };
-            } else {
+            } else if (CstyleBehaviour.isSaneInsertion(editor, session)) {
                 CstyleBehaviour.recordAutoInsert(editor, session, "]");
                 return {
                     text: '[]',