diff --git a/src/vs/workbench/parts/extensions/node/extensionsWorkbenchService.ts b/src/vs/workbench/parts/extensions/node/extensionsWorkbenchService.ts
index 7dc3eb0d8a6e6e3c9db0396d985320e18f5e8041..d7aeefd8da3be79dc8f140e98b61405652e03528 100644
--- a/src/vs/workbench/parts/extensions/node/extensionsWorkbenchService.ts
+++ b/src/vs/workbench/parts/extensions/node/extensionsWorkbenchService.ts
@@ -841,7 +841,14 @@ export class ExtensionsWorkbenchService implements IExtensionsWorkbenchService {
 				}
 
 				const extension = result.firstPage[0];
-				this.open(extension).done(null, error => this.onError(error));
+				const promises = [this.open(extension)];
+
+				if (this.local.every(local => local.identifier !== extension.identifier)) {
+					promises.push(this.install(extension));
+				}
+
+				TPromise.join(promises)
+					.done(null, error => this.onError(error));
 			});
 	}