diff --git a/src/window.c b/src/window.c
index 5a5ae6c..2d8f801 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4370,6 +4370,10 @@
     block_autocmds();
 #endif
 
+#ifdef FEAT_LUA
+    lua_window_free(wp);
+#endif
+
 #ifdef FEAT_MZSCHEME
     mzscheme_window_free(wp);
 #endif