diff --git a/lib/ace/document.js b/lib/ace/document.js
index c4f8a9eb..e203d77c 100644
--- a/lib/ace/document.js
+++ b/lib/ace/document.js
@@ -569,6 +569,10 @@ var Document = function(textOrLines) {
     **/
     this.applyDelta = function(delta, doNotValidate) {
 
+        // An empty range is a NOOP.
+        if (delta.range.isEmpty())
+            return;
+        
         // Split large insert deltas. This is necessary because:
         //    1. We need to support splicing delta lines into the document via $lines.splice.apply(...)
         //    2. fn.apply() doesn't work for a large number of params. The mallest threshold is on safari 0xFFFF.