diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
index 5227bcd90..8711d43e4 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
@@ -148,7 +148,7 @@ namespace UniGLTF
             }
         }
 
-        static void Export_Emission(Material m, ITextureExporter textureExporter, glTFMaterial material, bool useEmissiveMultiplier = false)
+        static void Export_Emission(Material m, ITextureExporter textureExporter, glTFMaterial material, bool useEmissiveMultiplier)
         {
             if (m.IsKeywordEnabled("_EMISSION") == false)
             {