diff --git a/sys/geom/geom_io.c b/sys/geom/geom_io.c
index 5e27f364f13..572dc756979 100644
--- a/sys/geom/geom_io.c
+++ b/sys/geom/geom_io.c
@@ -582,7 +582,7 @@ g_io_schedule_up(struct thread *tp __unused)
 			g_bioq_unlock(&g_bio_run_up);
 			THREAD_NO_SLEEPING();
 			CTR4(KTR_GEOM, "g_up biodone bp %p provider %s off "
-			    "%ld len %ld", bp, bp->bio_to->name,
+			    "%jd len %ld", bp, bp->bio_to->name,
 			    bp->bio_offset, bp->bio_length);
 			biodone(bp);
 			THREAD_SLEEPING_OK();