1 files changed, 0 insertions, 1 deletions

diff --git a/src/alloc.c b/src/alloc.c
index d7006ca6bfd..8632897606a 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -271,7 +271,6 @@ Lisp_Object Qpost_gc_hook;
 static void mark_buffer (Lisp_Object);
 static void mark_terminals (void);
 extern void mark_kboards (void);
-extern void mark_ttys (void);
 extern void mark_backtrace (void);
 static void gc_sweep (void);
 static void mark_glyph_matrix (struct glyph_matrix *);