diff --git a/src/layer/layer_settings_manager.cpp b/src/layer/layer_settings_manager.cpp
index be96094..ab09b1a 100644
--- a/src/layer/layer_settings_manager.cpp
+++ b/src/layer/layer_settings_manager.cpp
@@ -293,7 +293,7 @@ std::string LayerSettings::GetEnvSetting(const char *pSettingName) {
         }
     }
 
-    return vl::ToLower(result);
+    return result;
 }
 
 std::string LayerSettings::GetFileSetting(const char *pSettingName) {