diff --git a/include/libtorrent/disk_io_thread.hpp b/include/libtorrent/disk_io_thread.hpp
index ef59929a3..3ef2728d0 100644
--- a/include/libtorrent/disk_io_thread.hpp
+++ b/include/libtorrent/disk_io_thread.hpp
@@ -220,7 +220,7 @@ namespace libtorrent
 #endif
 #ifdef TORRENT_DISK_STATS
 	protected:
-		void disk_buffer_pool::rename_buffer(char* buf, char const* category);
+		void rename_buffer(char* buf, char const* category);
 		std::map<std::string, int> m_categories;
 		std::map<char*, std::string> m_buf_to_category;
 		std::ofstream m_log;