diff --git a/sys/dev/mvs/mvs.c b/sys/dev/mvs/mvs.c
index aafe68d04685a3..f2cccf614a3e17 100644
--- a/sys/dev/mvs/mvs.c
+++ b/sys/dev/mvs/mvs.c
@@ -209,6 +209,7 @@ mvs_ch_attach(device_t dev)
 err0:
 	bus_release_resource(dev, SYS_RES_MEMORY, ch->unit, ch->r_mem);
 	mtx_unlock(&ch->mtx);
+	mvs_slotsfree(dev);
 	mtx_destroy(&ch->mtx);
 	return (error);
 }