diff --git a/dlls/ole32/compobj_private.h b/dlls/ole32/compobj_private.h
index f11186cb46f..9f56d47567e 100644
--- a/dlls/ole32/compobj_private.h
+++ b/dlls/ole32/compobj_private.h
@@ -187,7 +187,7 @@ HRESULT FTMarshalCF_Create(REFIID riid, LPVOID *ppv) DECLSPEC_HIDDEN;
 ULONG stub_manager_int_release(struct stub_manager *This) DECLSPEC_HIDDEN;
 ULONG stub_manager_ext_addref(struct stub_manager *m, ULONG refs, BOOL tableweak) DECLSPEC_HIDDEN;
 ULONG stub_manager_ext_release(struct stub_manager *m, ULONG refs, BOOL tableweak, BOOL last_unlock_releases) DECLSPEC_HIDDEN;
-struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *sb, IUnknown *iptr, REFIID iid,
+struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *sb, REFIID iid,
      DWORD dest_context, void *dest_context_data, MSHLFLAGS flags) DECLSPEC_HIDDEN;
 struct ifstub *stub_manager_find_ifstub(struct stub_manager *m, REFIID iid, MSHLFLAGS flags) DECLSPEC_HIDDEN;
 struct stub_manager *get_stub_manager(APARTMENT *apt, OID oid) DECLSPEC_HIDDEN;
diff --git a/dlls/ole32/marshal.c b/dlls/ole32/marshal.c
index d142b935377..73b94095e9b 100644
--- a/dlls/ole32/marshal.c
+++ b/dlls/ole32/marshal.c
@@ -148,16 +148,10 @@ HRESULT marshal_object(APARTMENT *apt, STDOBJREF *stdobjref, REFIID riid, IUnkno
     ifstub = stub_manager_find_ifstub(manager, riid, mshlflags);
     if (!ifstub) {
         IRpcStubBuffer *stub = NULL;
-        IUnknown *iobject = NULL; /* object of type riid */
-
-        hr = IUnknown_QueryInterface(object, riid, (void **)&iobject);
-        if (hr != S_OK)
-            ERR("object doesn't expose interface %s, failing with error 0x%08x\n",
-                debugstr_guid(riid), hr);
 
         /* IUnknown doesn't require a stub buffer, because it never goes out on
          * the wire */
-        if (hr == S_OK && !IsEqualIID(riid, &IID_IUnknown))
+        if (!IsEqualIID(riid, &IID_IUnknown))
         {
             IPSFactoryBuffer *psfb;
 
@@ -176,12 +170,11 @@ HRESULT marshal_object(APARTMENT *apt, STDOBJREF *stdobjref, REFIID riid, IUnkno
         }
 
         if (hr == S_OK) {
-            ifstub = stub_manager_new_ifstub(manager, stub, iobject, riid, dest_context, dest_context_data, mshlflags);
+            ifstub = stub_manager_new_ifstub(manager, stub, riid, dest_context, dest_context_data, mshlflags);
             if (!ifstub)
                 hr = E_OUTOFMEMORY;
         }
         if (stub) IRpcStubBuffer_Release(stub);
-        if (iobject) IUnknown_Release(iobject);
 
         if (hr != S_OK) {
             stub_manager_int_release(manager);
diff --git a/dlls/ole32/stubmanager.c b/dlls/ole32/stubmanager.c
index 1f79ff5bc07..3b9086dccb7 100644
--- a/dlls/ole32/stubmanager.c
+++ b/dlls/ole32/stubmanager.c
@@ -65,21 +65,28 @@ static inline HRESULT generate_ipid(struct stub_manager *m, IPID *ipid)
 }
 
 /* registers a new interface stub COM object with the stub manager and returns registration record */
-struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *sb, IUnknown *iptr, REFIID iid, DWORD dest_context,
+struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *sb, REFIID iid, DWORD dest_context,
     void *dest_context_data, MSHLFLAGS flags)
 {
     struct ifstub *stub;
     HRESULT hr;
 
-    TRACE("oid=%s, stubbuffer=%p, iptr=%p, iid=%s\n",
-          wine_dbgstr_longlong(m->oid), sb, iptr, debugstr_guid(iid));
+    TRACE("oid=%s, stubbuffer=%p, iid=%s\n", wine_dbgstr_longlong(m->oid), sb, debugstr_guid(iid));
 
     stub = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct ifstub));
     if (!stub) return NULL;
 
+    hr = IUnknown_QueryInterface(m->object, iid, (void **)&stub->iface);
+    if (hr != S_OK)
+    {
+        HeapFree(GetProcessHeap(), 0, stub);
+        return NULL;
+    }
+
     hr = RPC_CreateServerChannel(dest_context, dest_context_data, &stub->chan);
     if (hr != S_OK)
     {
+        IUnknown_Release(stub->iface);
         HeapFree(GetProcessHeap(), 0, stub);
         return NULL;
     }
@@ -87,8 +94,6 @@ struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *s
     stub->stubbuffer = sb;
     if (sb) IRpcStubBuffer_AddRef(sb);
 
-    IUnknown_AddRef(iptr);
-    stub->iface = iptr;
     stub->flags = flags;
     stub->iid = *iid;