diff --git a/source/rpc_server/srv_pipe.c b/source/rpc_server/srv_pipe.c
index 705add6..dbee760 100644
--- a/source/rpc_server/srv_pipe.c
+++ b/source/rpc_server/srv_pipe.c
@@ -2150,7 +2150,7 @@ bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss
 
 	auth_len = p->hdr.auth_len;
 
-	if (auth_len != RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN) {
+	if (auth_len < RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN) {
 		DEBUG(0,("Incorrect auth_len %u.\n", (unsigned int)auth_len ));
 		return False;
 	}