diff --git a/src/package.ts b/src/package.ts
index 756e6d7d..54c638d4 100644
--- a/src/package.ts
+++ b/src/package.ts
@@ -19,6 +19,7 @@ import {
 	validateVersion,
 	validateEngineCompatibility,
 	validateVSCodeTypesCompatibility,
+	validatePublisher,
 } from './validation';
 import { detectYarn, getDependencies } from './npm';
 import * as GitHost from 'hosted-git-info';
@@ -1250,6 +1251,7 @@ export class ValidationProcessor extends BaseProcessor {
 
 export function validateManifest(manifest: Manifest): Manifest {
 	validateExtensionName(manifest.name);
+	validatePublisher(manifest.publisher);
 
 	if (!manifest.version) {
 		throw new Error('Manifest missing field: version');
diff --git a/src/validation.ts b/src/validation.ts
index 14070d3c..12e2a655 100644
--- a/src/validation.ts
+++ b/src/validation.ts
@@ -12,7 +12,7 @@ export function validatePublisher(publisher: string): void {
 
 	if (!nameRegex.test(publisher)) {
 		throw new Error(
-			`Invalid publisher name '${publisher}'. Expected the identifier of a publisher, not its human-friendly name.  Learn more: https://code.visualstudio.com/api/working-with-extensions/publishing-extension#publishing-extensions`
+			`Invalid publisher name '${publisher}'. Expected the identifier of a publisher, not its human-friendly name. Learn more: https://code.visualstudio.com/api/working-with-extensions/publishing-extension#publishing-extensions`
 		);
 	}
 }