The purpose of this #ifdef is to make the Tumblr sharing not show up, if the user doesn't have their own token.  So you should make the code like this:

```

    NSMutableArray* appActivities = [NSMutableArray array];

    OPShareToRedditActivity* shareToReddit = [[OPShareToRedditActivity alloc] init];
    [appActivities addObject:shareToReddit];
    
#ifndef kOPACTIVITYTOKEN_TUMBLR
#warning *** WARNING: Make sure you have added your Tumblr token to OPActivityTokens.h
#else
    OPShareToTumblrActivity* shareToTumblr = [[OPShareToTumblrActivity alloc] init];
    [appActivities addObject:shareToTumblr];
#endif
```

As written, it keeps your reddit code from showing up when there isn't a Tumblr token.