diff --git a/BasiliskII/src/Unix/rpc_unix.cpp b/BasiliskII/src/Unix/rpc_unix.cpp
index eeb65a54..9eb3c22e 100644
--- a/BasiliskII/src/Unix/rpc_unix.cpp
+++ b/BasiliskII/src/Unix/rpc_unix.cpp
@@ -960,7 +960,7 @@ int rpc_dispatch(rpc_connection_t *connection)
   rpc_message_init(&message, connection);
 
   int32_t method, value, ret = RPC_MESSAGE_FAILURE;
-  if (rpc_message_recv_int32(&message, &value) != RPC_ERROR_NO_ERROR &&
+  if (rpc_message_recv_int32(&message, &value) != RPC_ERROR_NO_ERROR ||
 	  value != RPC_MESSAGE_START)
 	return ret;