diff --git a/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Config/Config.ts b/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Config/Config.ts
index f7d53874b..43d4bbad3 100644
--- a/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Config/Config.ts
+++ b/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Config/Config.ts
@@ -28,7 +28,7 @@ export interface IService {
     anonymize_enabled : boolean;
     // the place for instance specific customizations
     // remember to parse (e.g. booleans) where they are used
-    custom : {[key : string]: string};
+    custom : {[key : string]: any};
     site_name : string;
     netiquette_url : string;
     cachebust : boolean;
diff --git a/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Embed/Embed.ts b/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Embed/Embed.ts
index 29d0c3cde..3c8149e1c 100644
--- a/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Embed/Embed.ts
+++ b/src/adhocracy_frontend/adhocracy_frontend/static/js/Packages/Core/Embed/Embed.ts
@@ -127,7 +127,8 @@ export class Service {
         var directiveName = this.provider.normalizeDirective(widget);
         var contextName = this.provider.normalizeContext(widget);
 
-        this.adhConfig.custom["hide_header"] = this.adhConfig.custom["hide_header"] || search.hasOwnProperty("noheader");
+        var noheader = search["noheader"] === "true" ? true : false;
+        this.adhConfig.custom["hide_header"] = this.adhConfig.custom["hide_header"] || noheader;
 
         if (this.provider.hasDirective(directiveName)) {
             this.widget = directiveName;