diff --git a/protocol.c b/protocol.c
index 9475e2d..594049e 100644
--- a/protocol.c
+++ b/protocol.c
@@ -1370,7 +1370,7 @@ enet_protocol_check_timeouts (ENetHost * host, ENetPeer * peer, ENetEvent * even
 
        if (peer -> earliestTimeout != 0 &&
              (ENET_TIME_DIFFERENCE (host -> serviceTime, peer -> earliestTimeout) >= peer -> timeoutMaximum ||
-               ((1 << (outgoingCommand -> sendAttempts - 1)) >= peer -> timeoutLimit &&
+               ((1U << (outgoingCommand -> sendAttempts - 1)) >= peer -> timeoutLimit &&
                  ENET_TIME_DIFFERENCE (host -> serviceTime, peer -> earliestTimeout) >= peer -> timeoutMinimum)))
        {
           enet_protocol_notify_disconnect (host, peer, event);