diff --git a/ShaderCompiler.h b/ShaderCompiler.h
index c1605b0..6ce787d 100644
--- a/ShaderCompiler.h
+++ b/ShaderCompiler.h
@@ -33,7 +33,7 @@ public:
 
     };
 
-    explicit SpirvShaderCompiler(Options opt = {})
+    explicit SpirvShaderCompiler(Options opt)
         : m_opt(std::move(opt))
     {
         ensureInitialized();