diff --git a/sys/dev/aacraid/aacraid.c b/sys/dev/aacraid/aacraid.c
index 688286c6c993..c8184fe5497b 100644
--- a/sys/dev/aacraid/aacraid.c
+++ b/sys/dev/aacraid/aacraid.c
@@ -903,6 +903,7 @@ aacraid_new_intr_type1(void *arg)
 	if (mode & AAC_INT_MODE_SYNC) {
 		if (sc->aac_sync_cm) {	
 			cm = sc->aac_sync_cm;
+			aac_unmap_command(cm);
 			cm->cm_flags |= AAC_CMD_COMPLETED;
 			/* is there a completion handler? */
 			if (cm->cm_complete != NULL) {