diff --git a/src/solver/utils/ortools_utils.cpp b/src/solver/utils/ortools_utils.cpp
index 2ba68547d1..3da6c8cf6c 100644
--- a/src/solver/utils/ortools_utils.cpp
+++ b/src/solver/utils/ortools_utils.cpp
@@ -63,10 +63,10 @@ void OrtoolsLogHandler::init()
     {
 #ifdef __linux__
         if (log_file_per_thread_.empty()
-            || (file_pointer = fopen(log_file_per_thread_.string().c_str(), "a+")) == nullptr)
+            || (file_pointer_ = fopen(log_file_per_thread_.string().c_str(), "a+")) == nullptr)
 #elif _WIN32
         if (log_file_per_thread_.empty()
-            || (file_pointer = _fsopen(log_file_per_thread_.string().c_str(), "a+", _SH_DENYNO))
+            || (file_pointer_ = _fsopen(log_file_per_thread_.string().c_str(), "a+", _SH_DENYNO))
                  == nullptr)
 #endif
         {
@@ -76,7 +76,7 @@ void OrtoolsLogHandler::init()
         }
         else
         {
-            setvbuf(file_pointer, nullptr, _IONBF, 0);
+            setvbuf(file_pointer_, nullptr, _IONBF, 0);
         }
     }
     else
@@ -87,10 +87,10 @@ void OrtoolsLogHandler::init()
 
 OrtoolsLogHandler::~OrtoolsLogHandler()
 {
-    if (file_pointer)
+    if (file_pointer_)
     {
-        fclose(file_pointer);
-        file_pointer = nullptr;
+        fclose(file_pointer_);
+        file_pointer_ = nullptr;
     }
 }
 
diff --git a/src/solver/utils/ortools_utils.h b/src/solver/utils/ortools_utils.h
index 1b0c9fe680..a7a0da65f8 100644
--- a/src/solver/utils/ortools_utils.h
+++ b/src/solver/utils/ortools_utils.h
@@ -81,7 +81,7 @@ class OrtoolsLogHandler : public LogHandlerInterface
 
     FILE* where_to_write()
     {
-        return file_pointer;
+        return file_pointer_;
     }
 
     void copy_log(Solver::IResultWriter& writer) const;
@@ -90,11 +90,12 @@ class OrtoolsLogHandler : public LogHandlerInterface
     void init();
 
     std::ofstream log_writer_;
-    FILE* file_pointer = nullptr;
+    FILE* file_pointer_ = nullptr;
     std::string solver_name_;
     std::filesystem::path log_directory_ = ".";
     std::filesystem::path log_file_per_thread_ = "";
 };
+
 class Nomenclature
 {
 public: