diff --git a/owlps-client/owlps-client.c b/owlps-client/owlps-client.c
index da3f608..0e7335d 100644
--- a/owlps-client/owlps-client.c
+++ b/owlps-client/owlps-client.c
@@ -329,8 +329,8 @@ void check_configuration()
     {
 #ifdef DEBUG
       fprintf(stderr,
-              "Warning! pkt_size cannot be greater than %hu bytes:"
-              " failing back to %hu.\n", MAX_PKT_SIZE, MAX_PKT_SIZE) ;
+              "Warning! pkt_size cannot be greater than %d bytes:"
+              " failing back to %d.\n", MAX_PKT_SIZE, MAX_PKT_SIZE) ;
 #endif // DEBUG
       options.pkt_size = MAX_PKT_SIZE ;
     }