Swamp Doctor's Tribal Mask only heals allied hero units, not creeps

[DeckardCainRPC]

STEPS TO REPRODUCE:

1. be ekkan
2. put on the hat
3. go make Q pets
4. have the Q pets stand near you
5. observe that your hat isn't healing them
6. frown

[DeckardCainRPC]

7. go put on the ivory griffin armor
8. it heals your pets
9. go put on the horn of the triumphant trinket
10. it heals your pets
11. why doesn't the tribal mask heal your pets?
12. satan