diff --git a/src/vs/vscode.d.ts b/src/vs/vscode.d.ts
index f8a21314598..326dae840f4 100644
--- a/src/vs/vscode.d.ts
+++ b/src/vs/vscode.d.ts
@@ -12349,17 +12349,17 @@ declare module 'vscode' {
 		/**
 		 * The [AuthenticationSession](#AuthenticationSession)s of the [AuthenticationProvider](#AuthentiationProvider) that have been added.
 		*/
-		readonly added: ReadonlyArray<AuthenticationSession>;
+		readonly added?: ReadonlyArray<AuthenticationSession>;
 
 		/**
 		 * The [AuthenticationSession](#AuthenticationSession)s of the [AuthenticationProvider](#AuthentiationProvider) that have been removed.
 		 */
-		readonly removed: ReadonlyArray<AuthenticationSession>;
+		readonly removed?: ReadonlyArray<AuthenticationSession>;
 
 		/**
 		 * The [AuthenticationSession](#AuthenticationSession)s of the [AuthenticationProvider](#AuthentiationProvider) that have been changed.
 		 */
-		readonly changed: ReadonlyArray<AuthenticationSession>;
+		readonly changed?: ReadonlyArray<AuthenticationSession>;
 	}
 
 	/**
diff --git a/src/vs/workbench/api/common/extHostAuthentication.ts b/src/vs/workbench/api/common/extHostAuthentication.ts
index ebce2edf567..d32ec2ad1dc 100644
--- a/src/vs/workbench/api/common/extHostAuthentication.ts
+++ b/src/vs/workbench/api/common/extHostAuthentication.ts
@@ -111,7 +111,11 @@ export class ExtHostAuthentication implements ExtHostAuthenticationShape {
 		}
 
 		const listener = provider.onDidChangeSessions(e => {
-			this._proxy.$sendDidChangeSessions(id, e);
+			this._proxy.$sendDidChangeSessions(id, {
+				added: e.added ?? [],
+				changed: e.changed ?? [],
+				removed: e.changed ?? []
+			});
 		});
 
 		this._proxy.$registerAuthenticationProvider(id, label, options?.supportsMultipleAccounts ?? false);