diff --git a/dlls/urlmon/umon.c b/dlls/urlmon/umon.c
index 67861394ed5..9031fa9f9c3 100644
--- a/dlls/urlmon/umon.c
+++ b/dlls/urlmon/umon.c
@@ -1135,7 +1135,15 @@ HRESULT WINAPI FindMimeFromData(LPBC pBC, LPCWSTR pwzUrl, LPVOID pBuffer,
  */
 HRESULT WINAPI IsAsyncMoniker(IMoniker *pmk)
 {
-    FIXME("stub\n");
+    IUnknown *am;
+    
+    TRACE("(%p)\n", pmk);
+    if(!pmk)
+        return E_INVALIDARG;
+    if(SUCCEEDED(IMoniker_QueryInterface(pmk, &IID_IAsyncMoniker, (void**)&am))) {
+        IUnknown_Release(am);
+        return S_OK;
+    }
     return S_FALSE;
 }
 
diff --git a/include/urlmon.h b/include/urlmon.h
index 368c71d4663..aaff473df77 100644
--- a/include/urlmon.h
+++ b/include/urlmon.h
@@ -1359,6 +1359,7 @@ void __RPC_STUB IInternetProtocolInfo_QueryInfo_Stub(
 
 #endif  /* __IInternetProtocolInfo_INTERFACE_DEFINED__ */
 
+DEFINE_GUID(IID_IAsyncMoniker, 0x79EAC9D3, 0xBAF9, 0x11CE, 0x8C, 0x82, 0x00, 0xAA, 0x00, 0x4B, 0xA9, 0x0B);
 DEFINE_GUID(CLSID_StdURLMoniker, 0x79EAC9E0, 0xBAF9, 0x11CE, 0x8C, 0x82, 0x00, 0xAA, 0x00, 0x4B, 0xA9, 0x0B);
 #define MK_S_ASYNCHRONOUS                0x000401E8
 #define S_ASYNCHRONOUS                   MK_S_ASYNCHRONOUS
diff --git a/include/urlmon.idl b/include/urlmon.idl
index 136cab0d63e..3f9382e295a 100644
--- a/include/urlmon.idl
+++ b/include/urlmon.idl
@@ -508,6 +508,7 @@ interface IInternetProtocolInfo : IUnknown
         [in] DWORD dwReserved);
 }
 
+cpp_quote("DEFINE_GUID(IID_IAsyncMoniker, 0x79EAC9D3, 0xBAF9, 0x11CE, 0x8C, 0x82, 0x00, 0xAA, 0x00, 0x4B, 0xA9, 0x0B);")
 cpp_quote("DEFINE_GUID(CLSID_StdURLMoniker, 0x79EAC9E0, 0xBAF9, 0x11CE, 0x8C, 0x82, 0x00, 0xAA, 0x00, 0x4B, 0xA9, 0x0B);")
 
 cpp_quote("#define MK_S_ASYNCHRONOUS                0x000401E8")