diff --git a/dlls/rpcrt4/ndr_stubless.c b/dlls/rpcrt4/ndr_stubless.c
index f5a6babb400..92a3665cbc4 100644
--- a/dlls/rpcrt4/ndr_stubless.c
+++ b/dlls/rpcrt4/ndr_stubless.c
@@ -1850,3 +1850,8 @@ RPCRTAPI LONG RPC_ENTRY NdrAsyncStubCall(struct IRpcStubBuffer* pThis,
     FIXME("unimplemented, expect crash!\n");
     return 0;
 }
+
+void RPC_ENTRY NdrAsyncServerCall(PRPC_MESSAGE pRpcMsg)
+{
+    FIXME("unimplemented, %p\n", pRpcMsg);
+}
diff --git a/dlls/rpcrt4/rpcrt4.spec b/dlls/rpcrt4/rpcrt4.spec
index f85d263e483..0fe9d658767 100644
--- a/dlls/rpcrt4/rpcrt4.spec
+++ b/dlls/rpcrt4/rpcrt4.spec
@@ -117,7 +117,7 @@
 @ stub NDRcopy
 @ stdcall NdrAllocate(ptr long)
 @ varargs NdrAsyncClientCall(ptr ptr)
-@ stub NdrAsyncServerCall
+@ stdcall NdrAsyncServerCall(ptr)
 @ stdcall NdrAsyncStubCall(ptr ptr ptr ptr)
 @ stdcall NdrByteCountPointerBufferSize(ptr ptr ptr)
 @ stdcall NdrByteCountPointerFree(ptr ptr ptr)