diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index 8d35e4796..53e7d7370 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -1696,7 +1696,7 @@ namespace libtorrent
 					ptime now = time_now_hires();
 					m_sort_time.add_sample(total_microseconds(now - sort_start));
 					m_cache_stats.cumulative_sort_time += total_milliseconds(now - sort_start);
-					m_cache_stats.cumulative_job_time += total_milliseconds(done - operation_start);
+					m_cache_stats.cumulative_job_time += total_milliseconds(now - operation_start);
 					continue;
 				}
 			}