diff --git a/src/mame/audio/exidy.c b/src/mame/audio/exidy.c
index c1d440ea0bd..cdb532ecf73 100644
--- a/src/mame/audio/exidy.c
+++ b/src/mame/audio/exidy.c
@@ -604,7 +604,7 @@ static READ8_HANDLER( exidy_sh8253_r )
  *
  *************************************/
 
-static READ8_HANDLER( exidy_sh6840_r )
+READ8_HANDLER( exidy_sh6840_r )
 {
 	logerror("%04X:exidy_sh6840_r - unexpected read", cpu_get_pc(space->cpu));
 	return 0;
diff --git a/src/mame/drivers/berzerk.c b/src/mame/drivers/berzerk.c
index 5f5689ff8ec..15f6742fc46 100644
--- a/src/mame/drivers/berzerk.c
+++ b/src/mame/drivers/berzerk.c
@@ -536,8 +536,7 @@ static READ8_HANDLER( berzerk_audio_r )
 		return 0;
 	/* everything else reads from the 6840 */
 	default:
-		//return exidy_sh6840_r(space, offset); // todo: finish this
-		return 0;
+		return exidy_sh6840_r(space, offset);
 	}
 }
 
diff --git a/src/mame/includes/exidy.h b/src/mame/includes/exidy.h
index 38c23f538de..6176848af37 100644
--- a/src/mame/includes/exidy.h
+++ b/src/mame/includes/exidy.h
@@ -24,6 +24,7 @@
 DEVICE_GET_INFO( exidy_sound );
 #define SOUND_EXIDY DEVICE_GET_INFO_NAME( exidy_sound )
 
+READ8_HANDLER( exidy_sh6840_r );
 WRITE8_HANDLER( exidy_sh6840_w );
 WRITE8_HANDLER( exidy_sfxctrl_w );