diff --git a/src/vs/workbench/api/node/extHostConfiguration.ts b/src/vs/workbench/api/node/extHostConfiguration.ts
index 8816bf77700..6798aad682a 100644
--- a/src/vs/workbench/api/node/extHostConfiguration.ts
+++ b/src/vs/workbench/api/node/extHostConfiguration.ts
@@ -15,7 +15,7 @@ import { IConfigurationData, ConfigurationTarget, IConfigurationModel } from 'vs
 import { Configuration, ConfigurationChangeEvent, ConfigurationModel } from 'vs/platform/configuration/common/configurationModels';
 import { WorkspaceConfigurationChangeEvent } from 'vs/workbench/services/configuration/common/configurationModels';
 import { ResourceMap } from 'vs/base/common/map';
-import { ConfigurationScope } from 'vs/platform/configuration/common/configurationRegistry';
+import { ConfigurationScope, OVERRIDE_PROPERTY_PATTERN } from 'vs/platform/configuration/common/configurationRegistry';
 import { isObject } from 'vs/base/common/types';
 
 declare var Proxy: any; // TODO@TypeScript
@@ -191,7 +191,7 @@ export class ExtHostConfiguration implements ExtHostConfigurationShape {
 	}
 
 	private _validateConfigurationAccess(key: string, resource: URI, extensionId: string): void {
-		const scope = this._configurationScopes[key];
+		const scope = OVERRIDE_PROPERTY_PATTERN.test(key) ? ConfigurationScope.RESOURCE : this._configurationScopes[key];
 		const extensionIdText = extensionId ? `[${extensionId}] ` : '';
 		if (ConfigurationScope.RESOURCE === scope) {
 			if (resource === void 0) {