diff --git a/src/plugins/sched/wiki/msg.c b/src/plugins/sched/wiki/msg.c
index 5252470c453015d2dad1636e770d9758d3542eaf..5e8a7138d05f22226f5ed0e43fbd6ddee970d43c 100644
--- a/src/plugins/sched/wiki/msg.c
+++ b/src/plugins/sched/wiki/msg.c
@@ -554,7 +554,7 @@ static size_t	_send_msg(slurm_fd_t new_fd, char *buf, size_t size)
 	data_sent = _write_bytes((int) new_fd, buf, size);
 	if (data_sent != size) {
 		error("wiki: unable to write data message (%lu of %lu) %m",
-			data_sent, size);
+			(long unsigned) data_sent, (long unsigned) size);
 	}
 
 	return data_sent;
diff --git a/src/plugins/sched/wiki2/msg.c b/src/plugins/sched/wiki2/msg.c
index c99ec8310679231f1a1347e7ab40392b0200b1d1..086e1c00c532cdeb6717c6624977ceb8b9874e96 100644
--- a/src/plugins/sched/wiki2/msg.c
+++ b/src/plugins/sched/wiki2/msg.c
@@ -604,7 +604,7 @@ static size_t	_send_msg(slurm_fd_t new_fd, char *buf, size_t size)
 	data_sent = _write_bytes((int) new_fd, buf, size);
 	if (data_sent != size) {
 		error("wiki: unable to write data message (%lu of %lu) %m",
-			data_sent, size);
+			(long unsigned) data_sent, (long unsigned) size);
 	}
 
 	return data_sent;