Index: head/sys/dev/aacraid/aacraid.c
===================================================================
--- head/sys/dev/aacraid/aacraid.c
+++ head/sys/dev/aacraid/aacraid.c
@@ -903,6 +903,7 @@
 	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) {