diff --git a/dll/win32/rpcrt4/rpc_async.c b/dll/win32/rpcrt4/rpc_async.c
index 00c2d6bede8..40628b4b4ef 100644
--- a/dll/win32/rpcrt4/rpc_async.c
+++ b/dll/win32/rpcrt4/rpc_async.c
@@ -166,3 +166,50 @@ RPC_STATUS WINAPI RpcAsyncCancelCall(PRPC_ASYNC_STATE pAsync, BOOL fAbortCall)
     FIXME("(%p, %s): stub\n", pAsync, fAbortCall ? "TRUE" : "FALSE");
     return RPC_S_INVALID_ASYNC_HANDLE;
 }
+
+#ifdef __REACTOS__
+/***********************************************************************
+ *           RpcGetAuthorizationContextForClient [RPCRT4.@]
+ * 
+ * Called by RpcFreeAuthorizationContext to return the Authz context.
+ * 
+ * PARAMS
+ *  ClientBinding        [I] Binding handle, represents a binding to a client on the server.
+ *  ImpersonateOnReturn  [I] Directs this function to be represented the client on return.
+ *  Reserved1            [I] Reserved, equal to null.
+ *  expiration_time      [I] Points to the exact date and time when the token expires.
+ *  Reserved2            [I] Reserved, equal to a LUID structure which has a members,
+ *                           each of them is set to zero.
+ *  Reserved3            [I] Reserved, equal to zero.
+ *  Reserved4            [I] Reserved, equal to null.
+ *  authz_client_context [I] Points to an AUTHZ_CLIENT_CONTEXT_HANDLE structure
+ *                           that has direct pass to Authz functions.
+ * 
+ * RETURNS
+ *  Success: RPC_S_OK.
+ *  Failure: Any error code.
+ */
+RPC_STATUS
+WINAPI
+RpcGetAuthorizationContextForClient(RPC_BINDING_HANDLE ClientBinding,
+                                    BOOL ImpersonateOnReturn,
+                                    void * Reserved1,
+                                    PLARGE_INTEGER expiration_time,
+                                    LUID Reserved2,
+                                    DWORD Reserved3,
+                                    PVOID Reserved4,
+                                    PVOID *authz_client_context)
+{
+    FIXME("(%p, %d, %p, %p, (%d, %u), %u, %p, %p): stub\n",
+          ClientBinding,
+          ImpersonateOnReturn,
+          Reserved1,
+          expiration_time,
+          Reserved2.HighPart,
+          Reserved2.LowPart,
+          Reserved3,
+          Reserved4,
+          authz_client_context);
+    return RPC_S_NO_CONTEXT_AVAILABLE;
+}
+#endif
diff --git a/dll/win32/rpcrt4/rpcrt4.spec b/dll/win32/rpcrt4/rpcrt4.spec
index 7bc8f6f85f1..38bdfd310ee 100644
--- a/dll/win32/rpcrt4/rpcrt4.spec
+++ b/dll/win32/rpcrt4/rpcrt4.spec
@@ -378,7 +378,7 @@
 378 stdcall RpcErrorStartEnumeration(ptr)
 379 stub RpcFreeAuthorizationContext
 380 stdcall RpcGetAsyncCallStatus(ptr) RpcAsyncGetCallStatus
-# RpcGetAuthorizationContextForClient
+381 stdcall RpcGetAuthorizationContextForClient(ptr long ptr ptr int64 long ptr ptr)
 382 stub RpcIfIdVectorFree
 383 stub RpcIfInqId
 384 stdcall RpcImpersonateClient(ptr)