diff --git a/lib/Runtime/Library/IntlEngineInterfaceExtensionObject.cpp b/lib/Runtime/Library/IntlEngineInterfaceExtensionObject.cpp
index d144b862daa..bf7fd8d6a0b 100644
--- a/lib/Runtime/Library/IntlEngineInterfaceExtensionObject.cpp
+++ b/lib/Runtime/Library/IntlEngineInterfaceExtensionObject.cpp
@@ -679,15 +679,17 @@ namespace Js
         char16 normalized[ULOC_FULLNAME_CAPACITY] = { 0 };
         size_t normalizedLength = 0;
         hr = NormalizeLanguageTag(argString->GetSz(), argString->GetLength(), normalized, &normalizedLength);
+        if (FAILED(hr))
+        {
+            HandleOOMSOEHR(hr);
+            //If we can't normalize the tag; return undefined.
+            return scriptContext->GetLibrary()->GetUndefined();
+        }
+
         retVal = Js::JavascriptString::NewCopyBuffer(normalized, static_cast<charcount_t>(normalizedLength), scriptContext);
 #else
         AutoHSTRING str;
         hr = GetWindowsGlobalizationAdapter(scriptContext)->NormalizeLanguageTag(scriptContext, argString->GetSz(), &str);
-        DelayLoadWindowsGlobalization *wsl = scriptContext->GetThreadContext()->GetWindowsGlobalizationLibrary();
-        PCWSTR strBuf = wsl->WindowsGetStringRawBuffer(*str, NULL);
-        retVal = Js::JavascriptString::NewCopySz(strBuf, scriptContext);
-#endif
-
         if (FAILED(hr))
         {
             HandleOOMSOEHR(hr);
@@ -695,6 +697,11 @@ namespace Js
             return scriptContext->GetLibrary()->GetUndefined();
         }
 
+        DelayLoadWindowsGlobalization *wsl = scriptContext->GetThreadContext()->GetWindowsGlobalizationLibrary();
+        PCWSTR strBuf = wsl->WindowsGetStringRawBuffer(*str, NULL);
+        retVal = Js::JavascriptString::NewCopySz(strBuf, scriptContext);
+#endif
+
         return retVal;
     }
     Var IntlEngineInterfaceExtensionObject::EntryIntl_ResolveLocaleLookup(RecyclableObject* function, CallInfo callInfo, ...)