diff --git a/src/ecmascript/mujs/document.c b/src/ecmascript/mujs/document.c
index e2a61c10..dea18f44 100644
--- a/src/ecmascript/mujs/document.c
+++ b/src/ecmascript/mujs/document.c
@@ -1554,6 +1554,10 @@ static void
 mjs_doctype_finalizer(js_State *J, void *node)
 {
 	attr_erase_from_map(map_doctypes, node);
+
+	if (node) {
+		dom_node_unref((dom_node *)node);
+	}
 }
 
 static void