diff --git a/src/devices/machine/8042kbdc.cpp b/src/devices/machine/8042kbdc.cpp
index 6c918c172cb..e054990a651 100644
--- a/src/devices/machine/8042kbdc.cpp
+++ b/src/devices/machine/8042kbdc.cpp
@@ -221,6 +221,7 @@ void kbdc8042_device::at_8042_clear_keyboard_received()
 	m_input_buffer_full_mouse_cb(0);
 	m_keyboard.received = 0;
 	m_mouse.received = 0;
+	m_data = 0;
 }
 
 TIMER_CALLBACK_MEMBER(kbdc8042_device::update_timer)