diff --git a/webshell/public/nsIWebShell.h b/webshell/public/nsIWebShell.h
index 3b58f441f5f36..c0e95dd8e7f84 100644
--- a/webshell/public/nsIWebShell.h
+++ b/webshell/public/nsIWebShell.h
@@ -204,7 +204,7 @@ class nsIWebShell : public nsIContentViewerContainer {
   // Chrome api's
   NS_IMETHOD SetTitle(const PRUnichar *aTitle) = 0;
 
-  NS_IMETHOD GetTitle(const PRUnichar **aResult) = 0;
+  NS_IMETHOD GetTitle(PRUnichar **aResult) = 0;
   /********* XXX End Stuff to be replaced by nsIBaseWindow ******/