diff --git a/src/vs/workbench/api/electron-browser/mainThreadComments.ts b/src/vs/workbench/api/electron-browser/mainThreadComments.ts
index 62c62250c8eb292868a7a04e69ad274dfea1965f..18ab18fb5bd387598c24163f6599934a497c9e48 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadComments.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadComments.ts
@@ -15,6 +15,7 @@ import { ICommentService } from 'vs/workbench/parts/comments/electron-browser/co
 import { COMMENTS_PANEL_ID } from 'vs/workbench/parts/comments/electron-browser/commentsPanel';
 import { IPanelService } from 'vs/workbench/services/panel/common/panelService';
 import { URI } from 'vs/base/common/uri';
+import { ITelemetryService } from 'vs/platform/telemetry/common/telemetry';
 
 @extHostNamedCustomer(MainContext.MainThreadComments)
 export class MainThreadComments extends Disposable implements MainThreadCommentsShape {
@@ -28,7 +29,8 @@ export class MainThreadComments extends Disposable implements MainThreadComments
 		extHostContext: IExtHostContext,
 		@IEditorService private _editorService: IEditorService,
 		@ICommentService private _commentService: ICommentService,
-		@IPanelService private _panelService: IPanelService
+		@IPanelService private _panelService: IPanelService,
+		@ITelemetryService private _telemetryService: ITelemetryService
 	) {
 		super();
 		this._disposables = [];
@@ -62,7 +64,7 @@ export class MainThreadComments extends Disposable implements MainThreadComments
 		);
 	}
 
-	$registerWorkspaceCommentProvider(handle: number): void {
+	$registerWorkspaceCommentProvider(handle: number, extensionId: string): void {
 		this._workspaceProviders.set(handle, undefined);
 		this._panelService.setPanelEnablement(COMMENTS_PANEL_ID, true);
 		if (this._firstSessionStart) {
@@ -74,6 +76,15 @@ export class MainThreadComments extends Disposable implements MainThreadComments
 				this._commentService.setWorkspaceComments(handle, commentThreads);
 			}
 		});
+
+		/* __GDPR__
+			"comments:registerWorkspaceCommentProvider" : {
+				"extensionId" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+			}
+		*/
+		this._telemetryService.publicLog('comments:registerWorkspaceCommentProvider', {
+			extensionId: extensionId
+		});
 	}
 
 	$unregisterDocumentCommentProvider(handle: number): void {
diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index 0fdef331821363c93ebfee6932902749e150266a..5ab71f4815f1be4d9904b60d566b950cf0ca0f38 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -608,7 +608,7 @@ export function createApiFactory(
 				return exthostCommentProviders.registerDocumentCommentProvider(provider);
 			}),
 			registerWorkspaceCommentProvider: proposedApiFunction(extension, (provider: vscode.WorkspaceCommentProvider) => {
-				return exthostCommentProviders.registerWorkspaceCommentProvider(provider);
+				return exthostCommentProviders.registerWorkspaceCommentProvider(extension.id, provider);
 			}),
 			onDidRenameFile: proposedApiFunction(extension, (listener, thisArg?, disposables?) => {
 				return extHostFileSystemEvent.onDidRenameFile(listener, thisArg, disposables);
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index cecfd8c108909cdba7b17625e2550042f2caa033..00f1445d35541788d2187935cd71a343e3bab485 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -102,7 +102,7 @@ export interface MainThreadCommandsShape extends IDisposable {
 export interface MainThreadCommentsShape extends IDisposable {
 	$registerDocumentCommentProvider(handle: number): void;
 	$unregisterDocumentCommentProvider(handle: number): void;
-	$registerWorkspaceCommentProvider(handle: number): void;
+	$registerWorkspaceCommentProvider(handle: number, extensionId: string): void;
 	$unregisterWorkspaceCommentProvider(handle: number): void;
 	$onDidCommentThreadsChange(handle: number, event: modes.CommentThreadChangedEvent): void;
 }
diff --git a/src/vs/workbench/api/node/extHostComments.ts b/src/vs/workbench/api/node/extHostComments.ts
index 3970fd566ac44184e03585763bcef53d0947125d..1ab328793c77128df8643ca698032df7c72f605e 100644
--- a/src/vs/workbench/api/node/extHostComments.ts
+++ b/src/vs/workbench/api/node/extHostComments.ts
@@ -31,11 +31,12 @@ export class ExtHostComments implements ExtHostCommentsShape {
 	}
 
 	registerWorkspaceCommentProvider(
+		extensionId: string,
 		provider: vscode.WorkspaceCommentProvider
 	): vscode.Disposable {
 		const handle = ExtHostComments.handlePool++;
 		this._workspaceProviders.set(handle, provider);
-		this._proxy.$registerWorkspaceCommentProvider(handle);
+		this._proxy.$registerWorkspaceCommentProvider(handle, extensionId);
 		this.registerListeners(handle, provider);
 
 		return {