diff --git a/src/table/settings.h b/src/table/settings.h
--- a/src/table/settings.h
+++ b/src/table/settings.h
@@ -611,6 +611,7 @@ const SettingDesc _settings[] = {
 	  SDTC_VAR(gui.developer,                 SLE_UINT8, S,  0,     1,        0,        2, 0, STR_NULL,                                       NULL),
 	 SDTC_BOOL(gui.newgrf_developer_tools,               S,  0, false,                        STR_NULL,                                       ReinitWindows),
 	 SDTC_BOOL(gui.ai_developer_tools,                   S,  0, false,                        STR_NULL,                                       NULL),
+	 SDTC_BOOL(gui.newgrf_show_old_versions,             S,  0, false,                        STR_NULL,                                       NULL),
 	  SDTC_VAR(gui.console_backlog_timeout,  SLE_UINT16, S,  0,   100,       10,    65500, 0, STR_NULL,                                       NULL),
 	  SDTC_VAR(gui.console_backlog_length,   SLE_UINT16, S,  0,   100,       10,    65500, 0, STR_NULL,                                       NULL),
 #ifdef ENABLE_NETWORK