diff --git a/src/in.c b/src/in.c
index e72bcbf..0a964c6 100644
--- a/src/in.c
+++ b/src/in.c
@@ -385,6 +385,7 @@
     ly_set_erase(&lydctx->node_types, NULL);
     ly_set_erase(&lydctx->meta_types, NULL);
     ly_set_erase(&lydctx->node_when, NULL);
+    ly_set_erase(&lydctx->node_exts, NULL);
 }
 
 LY_ERR