diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/workspace/conditions/workspace-content-type-alias.condition.ts b/src/Umbraco.Web.UI.Client/src/packages/core/workspace/conditions/workspace-content-type-alias.condition.ts
index 1bc9682240..eefd16baa0 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/workspace/conditions/workspace-content-type-alias.condition.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/workspace/conditions/workspace-content-type-alias.condition.ts
@@ -36,7 +36,7 @@ export class UmbWorkspaceContentTypeAliasCondition
 				this.observe(
 					context.structure.contentTypeAliases,
 					(contentTypeAliases) => {
-						this.permitted = contentTypeAliases ? permissionCheck(contentTypeAliases) : false;
+						this.permitted = contentTypeAliases ? permissionCheck!(contentTypeAliases) : false;
 					},
 					ObserveSymbol,
 				);