diff --git a/src/devices/machine/z80sio.c b/src/devices/machine/z80sio.c
index 806be33d3bb..f9b55de63f5 100644
--- a/src/devices/machine/z80sio.c
+++ b/src/devices/machine/z80sio.c
@@ -53,7 +53,7 @@
 //  MACROS / CONSTANTS
 //**************************************************************************
 
-#define VERBOSE 2
+#define VERBOSE 0
 
 #define LOG(x) do { if (VERBOSE) logerror x; } while (0)
 #if VERBOSE == 2