diff --git a/dlls/mshtml/dispex.c b/dlls/mshtml/dispex.c
index 5d472eec840..4e44130e0ac 100644
--- a/dlls/mshtml/dispex.c
+++ b/dlls/mshtml/dispex.c
@@ -407,7 +407,7 @@ static HRESULT WINAPI DispatchEx_GetDispID(IDispatchEx *iface, BSTR bstrName, DW
 
     TRACE("(%p)->(%s %x %p)\n", This, debugstr_w(bstrName), grfdex, pid);
 
-    if(grfdex & ~(fdexNameCaseSensitive|fdexNameEnsure))
+    if(grfdex & ~(fdexNameCaseSensitive|fdexNameEnsure|fdexNameImplicit))
         FIXME("Unsupported grfdex %x\n", grfdex);
 
     data = get_dispex_data(This);
diff --git a/dlls/mshtml/tests/script.c b/dlls/mshtml/tests/script.c
index 89e17fea6be..bbd9c3cca5f 100644
--- a/dlls/mshtml/tests/script.c
+++ b/dlls/mshtml/tests/script.c
@@ -477,8 +477,10 @@ static HRESULT WINAPI ActiveScriptParse_ParseScriptText(IActiveScriptParse *ifac
 
     tmp = SysAllocString(testW);
     hres = IDispatchEx_GetDispID(document, tmp, fdexNameCaseSensitive, &id);
-    SysFreeString(tmp);
     ok(hres == DISP_E_UNKNOWNNAME, "GetDispID(document) failed: %08x, expected DISP_E_UNKNOWNNAME\n", hres);
+    hres = IDispatchEx_GetDispID(document, tmp, fdexNameCaseSensitive | fdexNameImplicit, &id);
+    ok(hres == DISP_E_UNKNOWNNAME, "GetDispID(document) failed: %08x, expected DISP_E_UNKNOWNNAME\n", hres);
+    SysFreeString(tmp);
 
     id = 0;
     tmp = SysAllocString(testW);