diff --git a/src/applications/differential/view/revisionupdatehistory/DifferentialRevisionUpdateHistoryView.php b/src/applications/differential/view/revisionupdatehistory/DifferentialRevisionUpdateHistoryView.php
index 4a99f86176..8c9c938c61 100644
--- a/src/applications/differential/view/revisionupdatehistory/DifferentialRevisionUpdateHistoryView.php
+++ b/src/applications/differential/view/revisionupdatehistory/DifferentialRevisionUpdateHistoryView.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright 2011 Facebook, Inc.
+ * Copyright 2012 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -308,11 +308,19 @@ final class DifferentialRevisionUpdateHistoryView extends AphrontView {
   private function renderBaseRevision(DifferentialDiff $diff) {
     switch ($diff->getSourceControlSystem()) {
       case 'git':
-        return substr($diff->getSourceControlBaseRevision(), 0, 7);
+        $base = $diff->getSourceControlBaseRevision();
+        if (strpos($base, '@') === false) {
+          return substr($base, 0, 7);
+        } else {
+          // The diff is from git-svn
+          $base = explode('@', $base);
+          $base = last($base);
+          return $base;
+        }
       case 'svn':
         $base = $diff->getSourceControlBaseRevision();
         $base = explode('@', $base);
-        $base = end($base);
+        $base = last($base);
         return $base;
       default:
         return null;