1 files changed, 1 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 62d859704a4..6c7f1d999c6 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1148,6 +1148,7 @@ extern void defsubr ();
 extern void defvar_lisp ();
 extern void defvar_bool ();
 extern void defvar_int ();
+extern void defvar_display ();
 
 /* Macros we use to define forwarded Lisp variables.
    These are used in the syms_of_FILENAME functions.  */