diff --git a/dlls/mshtml/htmldoc.c b/dlls/mshtml/htmldoc.c
index a9db9202108..6992c93b5ac 100644
--- a/dlls/mshtml/htmldoc.c
+++ b/dlls/mshtml/htmldoc.c
@@ -1578,8 +1578,17 @@ static HRESULT WINAPI HTMLDocument_get_onerrorupdate(IHTMLDocument2 *iface, VARI
 static HRESULT WINAPI HTMLDocument_toString(IHTMLDocument2 *iface, BSTR *String)
 {
     HTMLDocument *This = impl_from_IHTMLDocument2(iface);
-    FIXME("(%p)->(%p)\n", This, String);
-    return E_NOTIMPL;
+
+    static const WCHAR objectW[] = {'[','o','b','j','e','c','t',']',0};
+
+    TRACE("(%p)->(%p)\n", This, String);
+
+    if(!String)
+        return E_INVALIDARG;
+
+    *String = SysAllocString(objectW);
+    return *String ? S_OK : E_OUTOFMEMORY;
+
 }
 
 static HRESULT WINAPI HTMLDocument_createStyleSheet(IHTMLDocument2 *iface, BSTR bstrHref,
diff --git a/dlls/mshtml/tests/dom.c b/dlls/mshtml/tests/dom.c
index cb1e7be588a..c16e0739f9b 100644
--- a/dlls/mshtml/tests/dom.c
+++ b/dlls/mshtml/tests/dom.c
@@ -5243,10 +5243,17 @@ static void test_doc_elem(IHTMLDocument2 *doc)
     IHTMLElement *elem;
     IHTMLDocument3 *doc3;
     HRESULT hres;
+    BSTR bstr;
 
     hres = IHTMLDocument2_QueryInterface(doc, &IID_IHTMLDocument3, (void**)&doc3);
     ok(hres == S_OK, "QueryInterface(IID_IHTMLDocument3) failed: %08x\n", hres);
 
+    hres = IHTMLDocument2_toString(doc, &bstr);
+    ok(hres == S_OK, "toString failed: %08x\n", hres);
+    ok(!strcmp_wa(bstr, "[object]"),
+            "toString returned %s, expected [object]\n", wine_dbgstr_w(bstr));
+    SysFreeString(bstr);
+
     hres = IHTMLDocument3_get_documentElement(doc3, &elem);
     IHTMLDocument3_Release(doc3);
     ok(hres == S_OK, "get_documentElement failed: %08x\n", hres);