diff --git a/src/mame/tecmo/tehkanwc.cpp b/src/mame/tecmo/tehkanwc.cpp
index 0d854d3afd5..44b9ebe8a9a 100644
--- a/src/mame/tecmo/tehkanwc.cpp
+++ b/src/mame/tecmo/tehkanwc.cpp
@@ -820,7 +820,7 @@ void tehkanwc_state::tehkanwc(machine_config &config)
 
 	/* video hardware */
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
-	screen.set_raw(18.432_MHz_XTAL / 3, 384, 0, 256, 264, 16, 240);
+	screen.set_raw(18.432_MHz_XTAL / 3, 384, 0, 256, 264, 16, 240); // verified from unofficial schematics
 	screen.set_screen_update(FUNC(tehkanwc_state::screen_update));
 	screen.set_palette(m_palette);