diff --git a/Ryujinx.Common/GraphicsDriver/DriverUtilities.cs b/Ryujinx.Common/GraphicsDriver/DriverUtilities.cs
index 60c176f8..3aabced7 100644
--- a/Ryujinx.Common/GraphicsDriver/DriverUtilities.cs
+++ b/Ryujinx.Common/GraphicsDriver/DriverUtilities.cs
@@ -6,7 +6,7 @@ namespace Ryujinx.Common.GraphicsDriver
     {
         public static void ToggleOGLThreading(bool enabled)
         {
-            Environment.SetEnvironmentVariable("mesa_glthread", enabled.ToString());
+            Environment.SetEnvironmentVariable("mesa_glthread", enabled.ToString().ToLower());
             Environment.SetEnvironmentVariable("__GL_THREADED_OPTIMIZATIONS", enabled ? "1" : "0");
 
             try