diff --git a/lib/ace/document.js b/lib/ace/document.js
index 479a76da..75a7920d 100644
--- a/lib/ace/document.js
+++ b/lib/ace/document.js
@@ -402,6 +402,8 @@ var Document = function(text) {
     *
     **/
     this.remove = function(range) {
+        if (!range instanceof Range)
+            range = Range.fromPoints(range.start, range.end);
         // clip to document
         range.start = this.$clipPosition(range.start);
         range.end = this.$clipPosition(range.end);
@@ -520,6 +522,8 @@ var Document = function(text) {
     *
     **/
     this.replace = function(range, text) {
+        if (!range instanceof Range)
+            range = Range.fromPoints(range.start, range.end);
         if (text.length == 0 && range.isEmpty())
             return range.start;