diff --git a/src/devices/bus/qbus/pc11.cpp b/src/devices/bus/qbus/pc11.cpp
index fbe0a5c035e..bece8806b1d 100644
--- a/src/devices/bus/qbus/pc11.cpp
+++ b/src/devices/bus/qbus/pc11.cpp
@@ -58,6 +58,7 @@ pc11_device::pc11_device(const machine_config &mconfig, const char *tag, device_
 	, m_rxvec(070)
 	, m_txvec(074)
 {
+	(void)pc11_regnames;
 }