diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index 3c22ef62f9a..fb2762dcc0b 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -466,7 +466,8 @@ export function createApiFactory(
 			onDidChangeConfiguration: (listener: (_: any) => any, thisArgs?: any, disposables?: extHostTypes.Disposable[]) => {
 				return extHostConfiguration.onDidChangeConfiguration(listener, thisArgs, disposables);
 			},
-			getConfiguration: (section?: string, resource?: vscode.Uri): vscode.WorkspaceConfiguration => {
+			getConfiguration(section?: string, resource?: vscode.Uri): vscode.WorkspaceConfiguration {
+				resource = arguments.length === 1 ? void 0 : resource;
 				return extHostConfiguration.getConfiguration(section, resource, extension.id);
 			},
 			registerTextDocumentContentProvider(scheme: string, provider: vscode.TextDocumentContentProvider) {
diff --git a/src/vs/workbench/api/node/extHostConfiguration.ts b/src/vs/workbench/api/node/extHostConfiguration.ts
index a40831278fc..e7fa2a2066c 100644
--- a/src/vs/workbench/api/node/extHostConfiguration.ts
+++ b/src/vs/workbench/api/node/extHostConfiguration.ts
@@ -132,8 +132,8 @@ export class ExtHostConfiguration implements ExtHostConfigurationShape {
 		const scope = this._configurationScopes.get(key);
 		const extensionIdText = extensionId ? `[${extensionId}] ` : '';
 		if (ConfigurationScope.RESOURCE === scope) {
-			if (!resource) {
-				console.warn(`${extensionIdText}Accessing a resource scoped configuration without providing a resource is not expected. To get the effective value for '${key}', provide the resource for which the value is needed. If you would like to look up all values, use 'inspect' method instead.`);
+			if (resource === void 0) {
+				console.warn(`${extensionIdText}Accessing a resource scoped configuration without providing a resource is not expected. To get the effective value for '${key}', provide the URI of a resource or 'null' for any resource.`);
 			}
 			return;
 		}