KeychainItemWrapper linking error

I just tried to use the KeychainItemWrapper provided by Apple, but I'm getting a linking error each time: Undefined symbols for architecture i386: "_OBJC_CLASS_$_KeychainItemWrapper", referenced from: objc-class-ref in DataModel.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) I've included the Security framework and checked why Apple included in the Xcode project, but I can't seem to find what else is going wrong. ``` _keychain = [[KeychainItemWrapper alloc] initWithIdentifier:@"com.website.project" accessGroup:nil]; [_keychain setObject:_username forKey:(id)kSecAttrAccount]; [_keychain setObject:_password forKey:(id)kSecValueData]; ``` I also added "com.website.project" to my Keychain Access Groups.