diff --git a/src/vs/workbench/api/common/extHostExtensionService.ts b/src/vs/workbench/api/common/extHostExtensionService.ts
index 9e6734e8e3a..b5ce835e074 100644
--- a/src/vs/workbench/api/common/extHostExtensionService.ts
+++ b/src/vs/workbench/api/common/extHostExtensionService.ts
@@ -327,6 +327,7 @@ export abstract class AbstractExtHostExtensionService implements ExtHostExtensio
 		}
 
 		this._logService.info(`ExtensionService#_doActivateExtension ${extensionDescription.identifier.value} ${JSON.stringify(reason)}`);
+		this._logService.flush();
 
 		const activationTimesBuilder = new ExtensionActivationTimesBuilder(reason.startup);
 		return Promise.all([
diff --git a/src/vs/workbench/api/node/extHostExtensionService.ts b/src/vs/workbench/api/node/extHostExtensionService.ts
index 8e96e6738ec..49a8e254fd5 100644
--- a/src/vs/workbench/api/node/extHostExtensionService.ts
+++ b/src/vs/workbench/api/node/extHostExtensionService.ts
@@ -82,6 +82,7 @@ export class ExtHostExtensionService extends AbstractExtHostExtensionService {
 		let r: T | null = null;
 		activationTimesBuilder.codeLoadingStart();
 		this._logService.info(`ExtensionService#loadCommonJSModule ${module.toString(true)}`);
+		this._logService.flush();
 		try {
 			r = require.__$__nodeRequire<T>(module.fsPath);
 		} catch (e) {