diff --git a/libavfilter/vf_blend.c b/libavfilter/vf_blend.c
index 6dbf1496d6..538774be3f 100644
--- a/libavfilter/vf_blend.c
+++ b/libavfilter/vf_blend.c
@@ -537,7 +537,7 @@ AVFilter ff_vf_tblend = {
     .name          = "tblend",
     .description   = NULL_IF_CONFIG_SMALL("Blend successive frames."),
     .priv_size     = sizeof(BlendContext),
-    .priv_class    = &blend_class,
+    .priv_class    = &tblend_class,
     .query_formats = query_formats,
     .init          = init,
     .uninit        = uninit,