diff --git a/lib/gfx/gx_shader.cpp b/lib/gfx/gx_shader.cpp
index a226b7b..5851c60 100644
--- a/lib/gfx/gx_shader.cpp
+++ b/lib/gfx/gx_shader.cpp
@@ -801,7 +801,7 @@ wgpu::ShaderModule build_shader(const ShaderConfig& config, const ShaderInfo& in
     }
   }
   vtxXfrAttrsPre += fmt::format(FMT_STRING("\n    var mv_pos = ubuf.pos_mtx * vec4<f32>({}, 1.0);"
-                                           "\n    var mv_nrm = ubuf.nrm_mtx * vec4<f32>({}, 0.0);"
+                                           "\n    var mv_nrm = normalize(ubuf.nrm_mtx * vec4<f32>({}, 0.0));"
                                            "\n    out.pos = ubuf.proj * vec4<f32>(mv_pos, 1.0);"),
                                 vtx_attr(config, GX_VA_POS), vtx_attr(config, GX_VA_NRM));
   if constexpr (EnableNormalVisualization) {
diff --git a/lib/internal.hpp b/lib/internal.hpp
index 67fa787..b54d7a7 100644
--- a/lib/internal.hpp
+++ b/lib/internal.hpp
@@ -49,7 +49,7 @@ using namespace std::string_view_literals;
   if (!(cond))                                                                                                         \
   UNLIKELY FATAL(msg, ##__VA_ARGS__)
 #ifdef NDEBUG
-#define CHECK
+#define CHECK(cond, msg, ...)
 #else
 #define CHECK(cond, msg, ...) ASSERT(cond, msg, ##__VA_ARGS__)
 #endif