diff --git a/libtorrent/src/torrent.cpp b/libtorrent/src/torrent.cpp
index a425a8f51..dc42bb340 100755
--- a/libtorrent/src/torrent.cpp
+++ b/libtorrent/src/torrent.cpp
@@ -2025,7 +2025,9 @@ namespace libtorrent
 		, boost::intrusive_ptr<peer_connection> const& p
 		, bool non_prioritized)
 	{
+        assert(m_bandwidth_limit[channel].throttle() > 0);
 		int block_size = m_bandwidth_limit[channel].throttle() / 10;
+        if (block_size <= 0) block_size = 1;
 
 		if (m_bandwidth_limit[channel].max_assignable() > 0)
 		{