diff --git a/tools/Master.cpp b/tools/Master.cpp
index 6b0b9b2a..b56b684c 100644
--- a/tools/Master.cpp
+++ b/tools/Master.cpp
@@ -1461,7 +1461,7 @@ void Master::generateSlaveXml(uint16_t slavePosition)
                 
                 cout
                     << "              <BitLen>"
-                    << (unsigned int) entry.bit_length
+                    << dec << (unsigned int) entry.bit_length
                     << "</BitLen>" << endl;
 
                 if (entry.index) {