diff --git a/sys/dev/ahci/ahci.c b/sys/dev/ahci/ahci.c
index d6357b2edcb..314bd91d119 100644
--- a/sys/dev/ahci/ahci.c
+++ b/sys/dev/ahci/ahci.c
@@ -969,6 +969,7 @@ err1:
 err0:
 	bus_release_resource(dev, SYS_RES_MEMORY, ch->unit, ch->r_mem);
 	mtx_unlock(&ch->mtx);
+	mtx_destroy(&ch->mtx);
 	return (error);
 }
 
diff --git a/sys/dev/siis/siis.c b/sys/dev/siis/siis.c
index 0aef7757114..ba10c92c469 100644
--- a/sys/dev/siis/siis.c
+++ b/sys/dev/siis/siis.c
@@ -527,6 +527,7 @@ err1:
 err0:
 	bus_release_resource(dev, SYS_RES_MEMORY, ch->unit, ch->r_mem);
 	mtx_unlock(&ch->mtx);
+	mtx_destroy(&ch->mtx);
 	return (error);
 }