diff --git a/data-access/engine/src/vlkb-obscore/src/database/DbConn.cpp b/data-access/engine/src/vlkb-obscore/src/database/DbConn.cpp
index 730ddb5c2ff483bded15176744b185b3e0307bb8..a32499391550baae8e25db5479c7f4d86e63bace 100644
--- a/data-access/engine/src/vlkb-obscore/src/database/DbConn.cpp
+++ b/data-access/engine/src/vlkb-obscore/src/database/DbConn.cpp
@@ -117,7 +117,7 @@ void DbConn::dbExecQuery(string query)
       pqxx::result r{txn.exec(query)};
 
       // column names
-      for(/*pqxx::row::size_type*/size_t i=0; i<r.columns();i++) LOG_STREAM << r.column_name(i) << "\t";
+      for(pqxx::row::size_type i=0; i<r.columns();i++) LOG_STREAM << r.column_name(i) << "\t";
       LOG_STREAM << endl;
 
 
@@ -156,7 +156,7 @@ vector<string> DbConn::dbExecQuery2(string query)
 
       // column names
       string columns;
-      for(/*pqxx::row::size_type*/size_t i=0; i<r.columns();i++)
+      for(pqxx::row::size_type i=0; i<r.columns();i++)
       {
          columns += string{r.column_name(i)} + " | ";
       }