diff --git a/src/devices/bus/pet/superpet.cpp b/src/devices/bus/pet/superpet.cpp
index ab518bec49f..6f7dcb9ea5e 100644
--- a/src/devices/bus/pet/superpet.cpp
+++ b/src/devices/bus/pet/superpet.cpp
@@ -135,14 +135,14 @@ inline void superpet_device::update_cpu()
 	if (cpu)
 	{
 		// 6502 active
-		m_maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
 		m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
+		m_maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
 	}
 	else
 	{
 		// 6809 active
-		m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
 		m_maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
+		m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE);
 	}
 }