From a3a59496d89871d0062097fed22086fd7674b931 Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Fri, 1 May 2015 22:20:22 +0000
Subject: [PATCH] fix build issue with non-atomic int64

---
 include/libtorrent/performance_counters.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/libtorrent/performance_counters.hpp b/include/libtorrent/performance_counters.hpp
index a2ded9397..311e14823 100644
--- a/include/libtorrent/performance_counters.hpp
+++ b/include/libtorrent/performance_counters.hpp
@@ -455,7 +455,7 @@ namespace libtorrent
 #else
 		// if the atomic type is't lock-free, use a single lock instead, for
 		// the whole array
-		mutex m_mutex;
+		mutable mutex m_mutex;
 		boost::int64_t m_stats_counter[num_counters];
 #endif
 	};