diff --git a/TommyPROM/PromAddressDriver.cpp b/TommyPROM/PromAddressDriver.cpp
index 968e8b8..b0044b8 100644
--- a/TommyPROM/PromAddressDriver.cpp
+++ b/TommyPROM/PromAddressDriver.cpp
@@ -15,7 +15,7 @@
 #define ADDR_DATA       A5
 
 // Define masks for the address clk and data lines on PC3..PC5 for direct port control.
-#define ADDR_CLK_HI_MASK    0x80
+#define ADDR_CLK_HI_MASK    0x08
 #define ADDR_CLK_LO_MASK    0x10
 #define ADDR_DATA_MASK      0x20
 
diff --git a/TommyPROM/TommyPROM.ino b/TommyPROM/TommyPROM.ino
index ae71fa6..46cb3fd 100644
--- a/TommyPROM/TommyPROM.ino
+++ b/TommyPROM/TommyPROM.ino
@@ -19,7 +19,7 @@
 #include "XModem.h"
 
 
-static const char * MY_VERSION = "2.2";
+static const char * MY_VERSION = "2.3";
 
 
 // Global status