diff --git a/src/node/db/Pad.js b/src/node/db/Pad.js
index 538476002..e70628b7a 100644
--- a/src/node/db/Pad.js
+++ b/src/node/db/Pad.js
@@ -290,7 +290,7 @@ Pad.prototype.setText = function setText(newText) {
   var oldText = this.text();
 
   //create the changeset
-  var changeset = Changeset.makeSplice(oldText, 0, oldText.length-1, newText);
+  var changeset = Changeset.makeSplice(oldText, 0, oldText.length, newText);
 
   //append the changeset
   this.appendRevision(changeset);
diff --git a/src/static/js/Changeset.js b/src/static/js/Changeset.js
index df180f9cf..04a055147 100644
--- a/src/static/js/Changeset.js
+++ b/src/static/js/Changeset.js
@@ -260,13 +260,13 @@ exports.checkRep = function (cs) {
       break;
     case '-':
       oldPos += o.chars;
-      exports.assert(oldPos < oldLen, oldPos, " >= ", oldLen, " in ", cs);
+      exports.assert(oldPos <= oldLen, oldPos, " > ", oldLen, " in ", cs);
       break;
     case '+':
       {
         calcNewLen += o.chars;
         numInserted += o.chars;
-        exports.assert(calcNewLen < newLen, calcNewLen, " >= ", newLen, " in ", cs);
+        exports.assert(calcNewLen <= newLen, calcNewLen, " > ", newLen, " in ", cs);
         break;
       }
     }
@@ -1408,8 +1408,8 @@ exports.makeSplice = function (oldFullText, spliceStart, numRemoved, newText, op
   if (spliceStart >= oldLen) {
     spliceStart = oldLen - 1;
   }
-  if (numRemoved > oldFullText.length - spliceStart - 1) {
-    numRemoved = oldFullText.length - spliceStart - 1;
+  if (numRemoved > oldFullText.length - spliceStart) {
+    numRemoved = oldFullText.length - spliceStart;
   }
   var oldText = oldFullText.substring(spliceStart, spliceStart + numRemoved);
   var newLen = oldLen + newText.length - oldText.length;