diff --git a/src/mame/drivers/gts1.c b/src/mame/drivers/gts1.c
index da96e9b3023..0791266dafd 100644
--- a/src/mame/drivers/gts1.c
+++ b/src/mame/drivers/gts1.c
@@ -266,6 +266,7 @@ static MACHINE_CONFIG_START( gts1, gts1_state )
     //MCFG_NVRAM_ADD_0FILL("nvram")
 
     /* General Purpose Display and Keyboard */
+    MCFG_DEVICE_ADD( "r10788", R10788, 0 )
     MCFG_R10788_UPDATE( WRITE8(gts1_state,gts1_display_w) )
 
     /* Video */