diff --git a/reading_machine/src/BaseConfig.cpp b/reading_machine/src/BaseConfig.cpp
index a3223e4893cfb45a8ba74da92e947bca65badaa6..a061c76909f9dd100c486e20d27d6eda9d5ae689 100644
--- a/reading_machine/src/BaseConfig.cpp
+++ b/reading_machine/src/BaseConfig.cpp
@@ -143,7 +143,7 @@ void BaseConfig::readTSVInput(std::string_view tsvFilename)
       get(isMultiColName, getNbLines()-1, 0) = EOSSymbol0;
 
     for (unsigned int i = 0; i < splited.size(); i++)
-      if (i < colIndex2Name.size())
+      if (i < colIndex2Name.size() - extraColumns.size())
       {
         std::string value = std::string(splited[i]);
         get(i, getNbLines()-1, 0) = value;