diff --git a/src/emu/machine/68561mpcc.h b/src/emu/machine/68561mpcc.h
index eab113ba9f5..8a7d8783c58 100644
--- a/src/emu/machine/68561mpcc.h
+++ b/src/emu/machine/68561mpcc.h
@@ -81,7 +81,7 @@ private:
 	int lastIRQStat;
 	IRQType_t IRQType;
 
-	Chan channel[1];
+	Chan channel[2];
 
 	devcb_write_line intrq_cb;