diff --git a/src/vs/workbench/api/common/menusExtensionPoint.ts b/src/vs/workbench/api/common/menusExtensionPoint.ts
index cd355e8fb92..bf05772230d 100644
--- a/src/vs/workbench/api/common/menusExtensionPoint.ts
+++ b/src/vs/workbench/api/common/menusExtensionPoint.ts
@@ -370,7 +370,7 @@ ExtensionsRegistry.registerExtensionPoint<{ [loc: string]: schema.IUserFriendlyM
 			}
 
 			if (schema.isProposedAPI(menu) && !extension.description.enableProposedApi) {
-				collector.error(localize('proposedAPI.invalid', "{0} is a proposed menu identifierand is only available when running out of dev or with the following command line switch: --enable-proposed-api ${extension.identifier.value}", menu));
+				collector.error(localize('proposedAPI.invalid', "{0} is a proposed menu identifier and is only available when running out of dev or with the following command line switch: --enable-proposed-api {1}", entry.key, extension.description.identifier.value));
 				return;
 			}