diff --git a/bundles/org.eclipse.orion.client.editor/web/orion/editor/editor.js b/bundles/org.eclipse.orion.client.editor/web/orion/editor/editor.js
index <HASH>..<HASH> 100644
--- a/bundles/org.eclipse.orion.client.editor/web/orion/editor/editor.js
+++ b/bundles/org.eclipse.orion.client.editor/web/orion/editor/editor.js
@@ -632,6 +632,8 @@ define("orion/editor/editor", ['i18n!orion/editor/nls/messages', 'orion/keyBindi
 				this._annotationRuler = this._overviewRuler = this._lineNumberRuler =
 				this._foldingRuler = this._currentLineAnnotation = this._title = null;
 			this._dirty = false;
+			this._foldingRulerVisible = this._overviewRulerVisible =
+				this._lineNumberRulerVisible = this._annotationRulerVisible = undefined;
 			
 			var textViewUninstalledEvent = {
 				type: "TextViewUninstalled", //$NON-NLS-0$
Bug <I> - Editor is missing rulers after removing and recreating the text view