diff --git a/src/solver/utils/ortools_utils.cpp b/src/solver/utils/ortools_utils.cpp
index 2a9701873b..820255b252 100644
--- a/src/solver/utils/ortools_utils.cpp
+++ b/src/solver/utils/ortools_utils.cpp
@@ -34,20 +34,19 @@ namespace Optimization
 {
 void setOrtoolsSolverLogs(MPSolver* solver, OrtoolsLogHandler& ortools_logger)
 {
-    // TODO won't work in ci, needs ortools update
-    // see https://github.com/rte-france/or-tools/pull/112
-    // std::filesystem::path log_file = logs.logfile().c_str();
-    // auto log_directory = log_file.parent_path();
-    // auto myid = std::this_thread::get_id();
-    // std::stringstream ss;
-    // ss << myid;
-    // auto log_file_per_thread = log_directory / (std::string("thread_") + ss.str() + ".log");
-    // // TODO
-    // log_writer.open(log_file_per_thread, std::ofstream::out | std::ofstream::app);
-    // log_streams.push_back(&log_writer);
     solver->EnableOutput(&ortools_logger);
 }
 
+OrtoolsLogHandler::OrtoolsLogHandler()
+{
+    std::filesystem::path log_file = logs.logfile().c_str();
+    auto log_directory = log_file.parent_path();
+    auto myid = std::this_thread::get_id();
+    std::stringstream ss;
+    ss << myid;
+    auto log_file_per_thread = log_directory / (std::string("thread_") + ss.str() + ".log");
+    log_writer_.open(log_file_per_thread, std::ofstream::out | std::ofstream::app);
+}
 ProblemSimplexeNommeConverter::ProblemSimplexeNommeConverter(
   const std::string& solverName,
   const Antares::Optimization::PROBLEME_SIMPLEXE_NOMME* problemeSimplexe) :
diff --git a/src/solver/utils/ortools_utils.h b/src/solver/utils/ortools_utils.h
index 6045acfc69..890f80eaf6 100644
--- a/src/solver/utils/ortools_utils.h
+++ b/src/solver/utils/ortools_utils.h
@@ -12,16 +12,6 @@
 
 using namespace operations_research;
 
-class OrtoolsLogHandler : public LogHandlerInterface
-{
-public:
-    // tmp test with std::cout
-    explicit OrtoolsLogHandler() = default;
-    void message(const char* msg) override
-    {
-        std::cout << msg << std::endl;
-    }
-};
 void ORTOOLS_EcrireJeuDeDonneesLineaireAuFormatMPS(MPSolver* solver,
                                                    Antares::Solver::IResultWriter& writer,
                                                    const std::string& filename);
@@ -58,6 +48,26 @@ namespace Antares
 {
 namespace Optimization
 {
+
+class OrtoolsLogHandler : public LogHandlerInterface
+{
+public:
+    // tmp test with std::cout
+    explicit OrtoolsLogHandler();
+    void message(const char* msg) override
+    {
+        log_writer_ << msg << std::endl;
+    }
+
+private:
+    // TODO won't work in ci, needs ortools update
+    // see https://github.com/rte-france/or-tools/pull/112
+
+    // // TODO
+    std::ofstream log_writer_;
+    // log_writer.open(log_file_per_thread, std::ofstream::out | std::ofstream::app);
+    // log_streams.push_back(&log_writer);
+};
 void setOrtoolsSolverLogs(MPSolver* solver, OrtoolsLogHandler &ortools_logger);
 class Nomenclature
 {