diff --git a/mcping.c b/mcping.c
index 44333a5..99c26c8 100644
--- a/mcping.c
+++ b/mcping.c
@@ -279,7 +279,7 @@ int main(int argc, char **argv) {
   freeaddrinfo(result);
 
   len = build_handshake(handshake, argv[1], port);
-  if (send(sfd, handshake, len, 0) != len) {
+  if (send(sfd, handshake, len, 0) != (ssize_t)len) {
     fprintf(stderr, "Failed to send handshake\n");
     return EXIT_FAILURE;
   }