diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index 926ec51ba5be..25f6a1f6ce20 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -3378,6 +3378,7 @@ nv50_mstm_del(struct nv50_mstm **pmstm)
 {
 	struct nv50_mstm *mstm = *pmstm;
 	if (mstm) {
+		drm_dp_mst_topology_mgr_destroy(&mstm->mgr);
 		kfree(*pmstm);
 		*pmstm = NULL;
 	}