diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index d6ae67fbe..8582b281f 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -2791,9 +2791,9 @@ namespace aux {
 					boost::shared_ptr<torrent> t2 = (*i)->associated_torrent().lock();
 					TORRENT_ASSERT(t2);
 					TORRENT_ASSERT((*prev)->uploaded_since_unchoke() * 1000
-						/ total_milliseconds(unchoke_interval) * t1->priority()
+						* (1 + t1->priority()) / total_milliseconds(unchoke_interval)
 						>= (*i)->uploaded_since_unchoke() * 1000
-						/ total_milliseconds(unchoke_interval) * t2->priority());
+						* (1 + t2->priority()) / total_milliseconds(unchoke_interval));
 				}
 				prev = i;
 			}