diff --git a/src/vs/workbench/services/extensions/common/abstractExtensionService.ts b/src/vs/workbench/services/extensions/common/abstractExtensionService.ts
index 5a571ed0f1f63..4ce5ee2f34e91 100644
--- a/src/vs/workbench/services/extensions/common/abstractExtensionService.ts
+++ b/src/vs/workbench/services/extensions/common/abstractExtensionService.ts
@@ -1132,6 +1132,9 @@ class ProposedApiController {
 			(_environmentService.isExtensionDevelopment && productService.quality !== 'stable') || // do not allow proposed API against stable builds when developing an extension
 			(this.enableProposedApiFor.length === 0 && Array.isArray(_environmentService.extensionEnabledProposedApi)); // always allow proposed API if --enable-proposed-api is provided without extension ID
 
+		// NOTE@coder: Always enable the proposed API.
+		this.enableProposedApiForAll = true;
+
 		this.productAllowProposedApi = new Set<string>();
 		if (isNonEmptyArray(productService.extensionAllowedProposedApi)) {
 			productService.extensionAllowedProposedApi.forEach((id) => this.productAllowProposedApi.add(ExtensionIdentifier.toKey(id)));