diff --git a/src/lm/tools/copilotRemoteAgentTool.ts b/src/lm/tools/copilotRemoteAgentTool.ts
index d8329d96b4..b2b7a1b876 100644
--- a/src/lm/tools/copilotRemoteAgentTool.ts
+++ b/src/lm/tools/copilotRemoteAgentTool.ts
@@ -134,7 +134,7 @@ export class CopilotRemoteAgentTool implements vscode.LanguageModelTool<CopilotR
 			const data: Uint8Array = Uint8Array.from(buffer);
 
 			// API might not be available for tests, this guarantees we are still able to test
-			const userAudience = vscode.LanguageModelPartAudience.User;
+			const userAudience = vscode.LanguageModelPartAudience?.User ?? 1;
 			lmResult.push(new vscode.LanguageModelDataPart2(data, 'application/pull-request+json', [userAudience]));
 		}