1 files changed, 1 insertions, 1 deletions

diff --git a/src/msdos.c b/src/msdos.c
index cc05323c97f..626119a0c00 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -2923,7 +2923,7 @@ syms_of_msdos ()
   staticpro (&recent_doskeys);
 
   defsubr (&Srecent_doskeys);
-  defsubt (&Smsdos_long_file_names);
+  defsubr (&Smsdos_long_file_names);
 }
 
 #endif /* MSDOS */