diff --git a/src/devices/bus/pc_joy/pc_joy.cpp b/src/devices/bus/pc_joy/pc_joy.cpp
index d90bee1e1cf..571aed854c9 100644
--- a/src/devices/bus/pc_joy/pc_joy.cpp
+++ b/src/devices/bus/pc_joy/pc_joy.cpp
@@ -23,7 +23,7 @@ pc_joy_device::pc_joy_device(const machine_config &mconfig, const char *tag, dev
 
 READ8_MEMBER ( pc_joy_device::joy_port_r )
 {
-	int delta = ((machine().time() - m_stime) * 256 * 1000).seconds();
+	int delta = ((machine().time() - m_stime) * 256 * 2325).seconds();
 
 	if(!m_dev)
 		return 0xf0;