diff --git a/src/RoslynCodeTaskFactory/Internal/Csc.cs b/src/RoslynCodeTaskFactory/Internal/Csc.cs
index fba512b..b246d0f 100644
--- a/src/RoslynCodeTaskFactory/Internal/Csc.cs
+++ b/src/RoslynCodeTaskFactory/Internal/Csc.cs
@@ -7,7 +7,7 @@ internal sealed class Csc : ManagedCompiler
     {
         public bool? NoStandardLib { get; set; }
 
-        protected override string ToolName => "Csc.exe";
+        protected override string ToolName => "csc.exe";
 
         protected internal override void AddResponseFileCommands(CommandLineBuilderExtension commandLine)
         {