diff --git a/lib/ace/edit_session.js b/lib/ace/edit_session.js
index c65e6818..9f31841c 100644
--- a/lib/ace/edit_session.js
+++ b/lib/ace/edit_session.js
@@ -1574,8 +1574,10 @@ var EditSession = function(text, mode) {
     **/
     this.setWrapLimitRange = function(min, max) {
         if (this.$wrapLimitRange.min !== min || this.$wrapLimitRange.max !== max) {
-            this.$wrapLimitRange.min = min;
-            this.$wrapLimitRange.max = max;
+            this.$wrapLimitRange = {
+                min: min,
+                max: max
+            };
             this.$modified = true;
             // This will force a recalculation of the wrap limit
             this._emit("changeWrapMode");