diff --git a/src/emu/machine/z8536.c b/src/emu/machine/z8536.c
index 40f70d3fd50..34b9a935b4e 100644
--- a/src/emu/machine/z8536.c
+++ b/src/emu/machine/z8536.c
@@ -35,7 +35,7 @@ const device_type Z8536 = &device_creator<z8536_device>;
 //  MACROS / CONSTANTS
 //**************************************************************************
 
-#define LOG 1
+#define LOG 0
 
 
 // states