--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -520,17 +520,17 @@
             onLocationChange : function(aWebProgress, aRequest, aLocation)
             {
               // The document loaded correctly, clear the value if we should
               if (this.mBrowser.userTypedClear > 0)
                 this.mBrowser.userTypedValue = null;
 
               if (aWebProgress.DOMWindow == this.mBrowser.contentWindow &&
                   aWebProgress.isLoadingDocument)
-                this.mTabBrowser.setIcon(this.mTab, null);
+                this.mTabBrowser.getBrowserForTab(this.mTab).mIconURL = null;
 
               // changing location, clear out the missing plugins list
               this.mBrowser.missingPlugins = null;
 
               if (this.mBlank)
                 return;
 
               if (this.mTabBrowser.mCurrentTab == this.mTab) {