diff --git a/trunk/ConsoleDataMigration/common/HardwareInfo.cpp b/trunk/ConsoleDataMigration/common/HardwareInfo.cpp
index c8a8f41..abf3edd 100644
--- a/trunk/ConsoleDataMigration/common/HardwareInfo.cpp
+++ b/trunk/ConsoleDataMigration/common/HardwareInfo.cpp
@@ -53,7 +53,15 @@ void HardwareInfo::AddCheckDigit(char* serial)
         odd = !odd;
     }
 
-    serial[len] = 10 - (digit % 10) + '0';
+    if(digit % 10 != 0)
+    {
+        serial[len] = 10 - (digit % 10) + '0';
+    }
+    else
+    {
+        serial[len] = '0';
+    }
+
     serial[len + 1] = '\0';
 }