diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 864f89d..2a5d842 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -2961,7 +2961,7 @@
     // Since we are starting to edit a file, consider the filetype to be
     // unset.  Helps for when an autocommand changes files and expects syntax
     // highlighting to work in the other file.
-    did_filetype = FALSE;
+    curbuf->b_did_filetype = FALSE;
 
 /*
  * other_file	oldbuf