xcodexcode-storyboardxcode-project

How to add storyboard back to xcode after accidentally deleted

I accidentally deleted my storyboard from the Xcode project. I followed this thread : Accidentally deleted Main.Storyboard and fortunately I found it in Base.lproj folder.

But I'm having trouble to add it back to Xcode project. Since I'm new to iOS and Xcode still I couldn't add it back to my project. I can open it separately.

Can someone point me out how can I add it back to my project? Any help would be appreciated.

Solution
    1. drag and drop it to Xcode's project navigator
    2. uncheck "Copy items if needed"