diff --git a/Drilling.cpp b/Drilling.cpp
index 1e0f0e2..b10a86b 100644
--- a/Drilling.cpp
+++ b/Drilling.cpp
@@ -246,6 +246,7 @@ Drilling::Drilling( void)
 {
    m_Params.m_sName = "*" ;
    m_Params.m_sToolName = "*" ;
+   m_Params.m_sDepth = "TH" ;
    m_TParams.m_sName = "*" ;
    m_TParams.m_sHead = "*" ;
    m_nStatus = MCH_ST_TO_VERIFY ;