diff --git a/src/emu/mame.c b/src/emu/mame.c
index 26952ea6a01..1a582ab2620 100644
--- a/src/emu/mame.c
+++ b/src/emu/mame.c
@@ -1313,6 +1313,12 @@ void mame_parse_ini_files(core_options *options, const game_driver *driver)
 		const device_config *device;
 		machine_config *config;
 		astring *sourcename;
+		
+		/* parse "vertical.ini" or "horizont.ini" */
+		if (driver->flags & ORIENTATION_SWAP_XY)
+			parse_ini_file(options, "vertical");
+		else
+			parse_ini_file(options, "horizont");
 
 		/* parse "vector.ini" for vector games */
 		config = machine_config_alloc(driver->machine_config);