diff --git a/src/misc2.c b/src/misc2.c
index a9f8fef..6346e3f 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -1085,7 +1085,8 @@
     reset_last_sourcing();
 
 #ifdef FEAT_WINDOWS
-    vim_free(first_tabpage);
+    free_tabpage(first_tabpage);
+    first_tabpage = NULL;
 #endif
 
 # ifdef UNIX