Empirical studies show that wireless sensor networks (WSNs) are extremely prone to the hidden terminal problem. As much as 50% of packet losses have been blamed to the hidden terminal problem under bursty communication. Current protocols use RTS-CTS handshakes to avoid collisions and alleviate the hidden terminal problem for unicast communication. However, it is not possible to directly or efficiently generalize this approach to broadcast communication. Motivated by this problem, we propose Robcast, a round-based self-stabilizing protocol for reliably broadcasting data using receiver-side collision detection feedback. The singlehop level reliability of Robcast can form a building block on which future applications and protocols can be designed for WSNs.