diff --git a/src/window.c b/src/window.c
index 6f27c5c..4abceb4 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4892,8 +4892,10 @@
     win_free_lsize(wp);
 
     for (i = 0; i < wp->w_tagstacklen; ++i)
+    {
 	vim_free(wp->w_tagstack[i].tagname);
-
+	vim_free(wp->w_tagstack[i].user_data);
+    }
     vim_free(wp->w_localdir);
 
     /* Remove the window from the b_wininfo lists, it may happen that the