diff --git a/mozilla/intl/locale/src/unix/nsDateTimeFormatUnix.cpp b/mozilla/intl/locale/src/unix/nsDateTimeFormatUnix.cpp
index ae9992fedfd..57a3847751e 100644
--- a/mozilla/intl/locale/src/unix/nsDateTimeFormatUnix.cpp
+++ b/mozilla/intl/locale/src/unix/nsDateTimeFormatUnix.cpp
@@ -60,7 +60,7 @@ nsresult nsDateTimeFormatUnix::Initialize(nsILocale* locale)
   else {
     res = locale->GetCategory(aCategory.GetUnicode(), &aLocaleUnichar);
     if (NS_SUCCEEDED(res) && NULL != aLocaleUnichar) {
-      if (mLocale.Length() && mLocale.EqualsIgnoreCase(aLocaleUnichar)) {
+      if (mLocale.Length() && mLocale.EqualsIgnoreCase(nsAutoString(aLocaleUnichar))) {
         nsMemory::Free(aLocaleUnichar);
         return NS_OK;
       }