diff --git a/sys/kern/subr_bus_dma.c b/sys/kern/subr_bus_dma.c
index 62a87441dbbd..38d192e55b96 100644
--- a/sys/kern/subr_bus_dma.c
+++ b/sys/kern/subr_bus_dma.c
@@ -386,6 +386,10 @@ bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
 	nsegs = -1;
 	error = _bus_dmamap_load_ccb(dmat, map, ccb, &nsegs, flags);
 	nsegs++;
+
+	CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
+	    __func__, dmat, flags, error, nsegs);
+
 	if (error == EINPROGRESS)
 		return (error);