diff --git a/examples/dotnet/csintegerprogramming.cs b/examples/dotnet/csintegerprogramming.cs
index 3791a17498..a17b8e099d 100644
--- a/examples/dotnet/csintegerprogramming.cs
+++ b/examples/dotnet/csintegerprogramming.cs
@@ -103,7 +103,6 @@ public class CsIntegerProgramming
     {
         CppBridge.InitLogging("csintegerprogramming.cs");
         CppFlags flags = new CppFlags();
-        flags.logtostderr = true;
         flags.log_prefix = false;
         CppBridge.SetFlags(flags);
 
diff --git a/ortools/init/csharp/InitTests.cs b/ortools/init/csharp/InitTests.cs
index cedb281481..cc7d52ac7d 100644
--- a/ortools/init/csharp/InitTests.cs
+++ b/ortools/init/csharp/InitTests.cs
@@ -31,7 +31,6 @@ public class InitTest
     public void CheckFlags()
     {
         Init.CppFlags cpp_flags = new Init.CppFlags();
-        cpp_flags.logtostderr = true;
         cpp_flags.log_prefix = true;
         cpp_flags.cp_model_dump_prefix = "init";
         cpp_flags.cp_model_dump_models = true;