diff --git a/src/vs/workbench/api/node/extHostApiCommands.ts b/src/vs/workbench/api/node/extHostApiCommands.ts
index 5e2daec330c..fff3803aa2e 100644
--- a/src/vs/workbench/api/node/extHostApiCommands.ts
+++ b/src/vs/workbench/api/node/extHostApiCommands.ts
@@ -163,10 +163,11 @@ class ExtHostApiCommands {
 			]
 		});
 
-		this._register('vscode.openFolder', (uri: URI) => this._commands.executeCommand('_workbench.ipc', 'vscode:windowOpen', [[uri.fsPath]]), {
-			description: 'Open a folder in the current window. Note that this will shutdown the current extension host process and start a new one on the given folder.',
+		this._register('vscode.openFolder', (uri: URI, newWindow?: boolean) => this._commands.executeCommand('_workbench.ipc', 'vscode:windowOpen', [[uri.fsPath], newWindow]), {
+			description: 'Open a folder in the current window. Note that this will shutdown the current extension host process and start a new one on the given folder unless the newWindow parameter is set to true.',
 			args: [
-				{ name: 'uri', description: 'Uri of the folder to open.', constraint: URI }
+				{ name: 'uri', description: 'Uri of the folder to open.', constraint: URI },
+				{ name: 'newWindow', description: '(optional) Wether to open the folder in a new window or the same. Defaults to opening in the same window.' }
 			]
 		});
 	}