diff --git a/src/emu/sound/sp0256.c b/src/emu/sound/sp0256.c
index 85782ef2900..4f083fc0e04 100644
--- a/src/emu/sound/sp0256.c
+++ b/src/emu/sound/sp0256.c
@@ -1270,6 +1270,13 @@ WRITE8_DEVICE_HANDLER( sp0256_ALD_w )
 	return;
 }
 
+READ_LINE_DEVICE_HANDLER( sp0256_sby_r )
+{
+	sp0256_state *sp = get_safe_token(device);
+
+	return sp->sby_line;
+}
+
 READ16_DEVICE_HANDLER( spb640_r )
 {
 	sp0256_state *sp = get_safe_token(device);
diff --git a/src/emu/sound/sp0256.h b/src/emu/sound/sp0256.h
index 324decbf099..2046501f877 100644
--- a/src/emu/sound/sp0256.h
+++ b/src/emu/sound/sp0256.h
@@ -62,6 +62,7 @@ struct _sp0256_interface
 void sp0256_bitrevbuff(UINT8 *buffer, unsigned int start, unsigned int length);
 
 WRITE8_DEVICE_HANDLER( sp0256_ALD_w );
+READ_LINE_DEVICE_HANDLER( sp0256_sby_r );
 
 READ16_DEVICE_HANDLER( spb640_r );
 WRITE16_DEVICE_HANDLER( spb640_w );