diff --git a/mozilla/xpfe/components/search/src/nsInternetSearchService.cpp b/mozilla/xpfe/components/search/src/nsInternetSearchService.cpp
index 6394e57ba28..be0e7e086c0 100755
--- a/mozilla/xpfe/components/search/src/nsInternetSearchService.cpp
+++ b/mozilla/xpfe/components/search/src/nsInternetSearchService.cpp
@@ -2659,7 +2659,7 @@ InternetSearchDataSource::GetSearchEngineList(nsFileSpec nativeDir, PRBool check
 				nsAutoString	iconURL;
 				PRInt32		extensionOffset;
 				extensionOffset = uri.RFind(".src", PR_TRUE);
-				if ((extensionOffset >= 0) && (extensionOffset == uri.Length()-4))
+				if ((extensionOffset >= 0) && (extensionOffset == len-4))
 				{
 					nsAutoString	temp;