diff --git a/build/lib/compilation.js b/build/lib/compilation.js
index 0c0c15f555d..5a882c3f88a 100644
--- a/build/lib/compilation.js
+++ b/build/lib/compilation.js
@@ -201,7 +201,6 @@ function apiProposalNamesGenerator() {
                 `${proposalNames.map(t => `\t${t[0]}: '${t[1]}'`).join(',\n')}`,
                 '});',
                 'export type ApiProposalName = keyof typeof allApiProposals;',
-                'export const allApiProposalNames = <readonly ApiProposalName[]><unknown>Object.keys(allApiProposals);',
                 '',
             ].join('\n');
             const outFile = path.join(dtsFolder, '../vs/workbench/services/extensions/common/extensionsApiProposals.ts');
diff --git a/build/lib/compilation.ts b/build/lib/compilation.ts
index f559e07ca77..120c0403755 100644
--- a/build/lib/compilation.ts
+++ b/build/lib/compilation.ts
@@ -243,7 +243,6 @@ function apiProposalNamesGenerator() {
 				`${proposalNames.map(t => `\t${t[0]}: '${t[1]}'`).join(',\n')}`,
 				'});',
 				'export type ApiProposalName = keyof typeof allApiProposals;',
-				'export const allApiProposalNames = <readonly ApiProposalName[]><unknown>Object.keys(allApiProposals);',
 				'',
 			].join('\n');
 
diff --git a/src/vs/workbench/services/extensions/common/abstractExtensionService.ts b/src/vs/workbench/services/extensions/common/abstractExtensionService.ts
index 6379907d099..cc23789aa09 100644
--- a/src/vs/workbench/services/extensions/common/abstractExtensionService.ts
+++ b/src/vs/workbench/services/extensions/common/abstractExtensionService.ts
@@ -34,7 +34,7 @@ import { URI } from 'vs/base/common/uri';
 import { IExtensionManifestPropertiesService } from 'vs/workbench/services/extensions/common/extensionManifestPropertiesService';
 import { Logger } from 'vs/workbench/services/extensions/common/extensionPoints';
 import { dedupExtensions } from 'vs/workbench/services/extensions/common/extensionsUtil';
-import { ApiProposalName, allApiProposalNames } from 'vs/workbench/services/extensions/common/extensionsApiProposals';
+import { ApiProposalName, allApiProposals } from 'vs/workbench/services/extensions/common/extensionsApiProposals';
 import { forEach } from 'vs/base/common/collections';
 import { ILogService } from 'vs/platform/log/common/log';
 
@@ -1136,14 +1136,14 @@ class ProposedApiController {
 			(_environmentService.isExtensionDevelopment && productService.quality !== 'stable') || // do not allow proposed API against stable builds when developing an extension
 			(this._envEnabledExtensions.size === 0 && Array.isArray(_environmentService.extensionEnabledProposedApi)); // always allow proposed API if --enable-proposed-api is provided without extension ID
 
-		this._productEnabledExtensions = new Map<string, string[]>();
+		this._productEnabledExtensions = new Map<string, ApiProposalName[]>();
 
 		// todo@jrieken this is deprecated and will be removed
 		// OLD world - extensions that are listed in `extensionAllowedProposedApi` get all proposals enabled
 		if (isNonEmptyArray(productService.extensionAllowedProposedApi)) {
 			for (let id of productService.extensionAllowedProposedApi) {
 				const key = ExtensionIdentifier.toKey(id);
-				this._productEnabledExtensions.set(key, allApiProposalNames.slice());
+				this._productEnabledExtensions.set(key, Object.keys(allApiProposals));
 			}
 		}
 
@@ -1151,7 +1151,7 @@ class ProposedApiController {
 		if (productService.extensionEnabledApiProposals) {
 			forEach(productService.extensionEnabledApiProposals, entry => {
 				const proposalNames = entry.value.filter(name => {
-					if (!allApiProposalNames.includes(<ApiProposalName>name)) {
+					if (!allApiProposals[<ApiProposalName>name]) {
 						_logService.warn(`Extension '${key} wants API proposal '${name}' but that proposal DOES NOT EXIST.`);
 						return false;
 					}
diff --git a/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts b/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts
index a8f956a9ae0..f30e65fd186 100644
--- a/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts
+++ b/src/vs/workbench/services/extensions/common/extensionsApiProposals.ts
@@ -9,4 +9,3 @@ export const allApiProposals = Object.freeze({
 	languageStatus: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.languageStatus.d.ts'
 });
 export type ApiProposalName = keyof typeof allApiProposals;
-export const allApiProposalNames = <readonly ApiProposalName[]><unknown>Object.keys(allApiProposals);