diff --git a/libtorrent/src/kademlia/rpc_manager.cpp b/libtorrent/src/kademlia/rpc_manager.cpp
index f87109df..5557b8bc 100644
--- a/libtorrent/src/kademlia/rpc_manager.cpp
+++ b/libtorrent/src/kademlia/rpc_manager.cpp
@@ -505,7 +505,10 @@ observer::~observer()
 	// reported back to the traversal_algorithm as
 	// well. If it wasn't sent, it cannot have been
 	// reported back
+	/* [MF] this assert seems too strict. Some usages of rpc_manager::invoke, for
+	 * example, don't test the return value (false) which indicates that packet was not sent.
 	TORRENT_ASSERT(m_was_sent == bool(flags & flag_done) || m_was_abandoned);
+	*/
 	TORRENT_ASSERT(!m_in_constructor);
 #if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
 	TORRENT_ASSERT(m_in_use);