diff --git a/wp-admin/edit-form-advanced.php b/wp-admin/edit-form-advanced.php
index bb629f421c..c5087979b9 100644
--- a/wp-admin/edit-form-advanced.php
+++ b/wp-admin/edit-form-advanced.php
@@ -7,7 +7,9 @@ $messages[1] = sprintf( __( 'Post updated. Continue editing below or <a href="%s
 $messages[2] = __('Custom field updated.');
 $messages[3] = __('Custom field deleted.');
 $messages[4] = __('Post updated.');
-$messages[5] = sprintf( __('Post restored to revision from %s'), wp_post_revision_title( $_GET['revision'], false ) );
+
+if ( isset($_GET['revision']) )
+	$messages[5] = sprintf( __('Post restored to revision from %s'), wp_post_revision_title( (int) $_GET['revision'], false ) );
 
 $notice = false;
 $notices[1] = __( 'There is an autosave of this post that is more recent than the version below.  <a href="%s">View the autosave</a>.' );
diff --git a/wp-admin/edit-page-form.php b/wp-admin/edit-page-form.php
index a563032710..c80214507a 100644
--- a/wp-admin/edit-page-form.php
+++ b/wp-admin/edit-page-form.php
@@ -5,7 +5,9 @@ $messages[1] = sprintf( __( 'Page updated. Continue editing below or <a href="%s
 $messages[2] = __('Custom field updated.');
 $messages[3] = __('Custom field deleted.');
 $messages[4] = __('Page updated.');
-$messages[5] = sprintf( __('Page restored to revision from %s'), wp_post_revision_title( $_GET['revision'], false ) );
+
+if ( isset($_GET['revision']) )
+	$messages[5] = sprintf( __('Page restored to revision from %s'), wp_post_revision_title( (int) $_GET['revision'], false ) );
 
 $notice = false;
 $notices[1] = __( 'There is an autosave of this page that is more recent than the version below.  <a href="%s">View the autosave</a>.' );