diff --git a/mozilla/extensions/spellcheck/src/mozEnglishWordUtils.cpp b/mozilla/extensions/spellcheck/src/mozEnglishWordUtils.cpp
index fa2f4a1ed32..9c2e1810833 100644
--- a/mozilla/extensions/spellcheck/src/mozEnglishWordUtils.cpp
+++ b/mozilla/extensions/spellcheck/src/mozEnglishWordUtils.cpp
@@ -39,9 +39,12 @@
 #include "nsICharsetAlias.h"
 #include "nsReadableUtils.h"
 #include "nsIServiceManager.h"
+#include "nsUnicharUtilCIID.h"
 #include "nsCRT.h"
 #include "cattable.h"
 
+static NS_DEFINE_CID(kUnicharUtilCID, NS_UNICHARUTIL_CID); 
+
 NS_IMPL_ISUPPORTS1(mozEnglishWordUtils, mozISpellI18NUtil)
 
 mozEnglishWordUtils::mozEnglishWordUtils()
@@ -74,6 +77,12 @@ NS_IMETHODIMP mozEnglishWordUtils::GetRootForm(const PRUnichar *aWord, PRUint32
 
   *count = 0;
 
+  if (!mCaseConv) {
+    mCaseConv = do_GetService(kUnicharUtilCID);
+    if (!mCaseConv)
+      return NS_ERROR_FAILURE;
+  }
+
   mozEnglishWordUtils::myspCapitalization ct = captype(word);
   switch (ct)
     {
@@ -138,7 +147,6 @@ NS_IMETHODIMP mozEnglishWordUtils::GetRootForm(const PRUnichar *aWord, PRUint32
         NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(1, tmpPtr);
         return NS_ERROR_OUT_OF_MEMORY;
       }
-      mCaseConv->ToLower(tmpPtr[1], tmpPtr[1], length);
 
       *words = tmpPtr;
       *count = 2;