diff --git a/Models/ThemeConfig/LayerConfig.ts b/Models/ThemeConfig/LayerConfig.ts
index 131bc23d6e..0582c57ac7 100644
--- a/Models/ThemeConfig/LayerConfig.ts
+++ b/Models/ThemeConfig/LayerConfig.ts
@@ -192,8 +192,7 @@ export default class LayerConfig extends WithContextLoader {
         this.passAllFeatures = json.passAllFeatures ?? false;
         this.minzoom = json.minzoom ?? 0;
         if(json["minZoom"] !== undefined){
-            //throw "At "+context+": minzoom is written all lowercase"
-            // TODO: REENABLE
+            throw "At "+context+": minzoom is written all lowercase"
         }
         this.minzoomVisible = json.minzoomVisible ?? this.minzoom;
         this.shownByDefault = json.shownByDefault ?? true;