diff --git a/src/globals.h b/src/globals.h
index 71d3433..c9e6d6c 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -380,6 +380,9 @@
 EXTERN guicolor_T cterm_normal_fg_gui_color INIT(= INVALCOLOR);
 EXTERN guicolor_T cterm_normal_bg_gui_color INIT(= INVALCOLOR);
 #endif
+#ifdef FEAT_TERMRESPONSE
+EXTERN int	is_mac_terminal INIT(= FALSE);  /* recognized Terminal.app */
+#endif
 
 #ifdef FEAT_AUTOCMD
 EXTERN int	autocmd_busy INIT(= FALSE);	/* Is apply_autocmds() busy? */