diff --git a/sys/dev/nge/if_nge.c b/sys/dev/nge/if_nge.c
index 933fd53452c..727bf44a483 100644
--- a/sys/dev/nge/if_nge.c
+++ b/sys/dev/nge/if_nge.c
@@ -964,6 +964,8 @@ nge_detach(dev)
 
 	contigfree(sc->nge_ldata, sizeof(struct nge_list_data), M_DEVBUF);
 
+	NGE_LOCK_DESTROY(sc);
+
 	return(0);
 }