diff --git a/ChangeLog b/ChangeLog
index 132c5772a..d64a72e56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,5 @@
 
+	* fixed low_prio_disk support on linux
 	* fixed time critical piece accounting in the request queue
 	* fixed semantics of rate_limit_utp to also ignore per-torrent limits
 	* fixed piece sorting bug of deadline pieces
diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index 045b5331d..b22bcae57 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -1781,7 +1781,8 @@ namespace libtorrent
 					setiopolicy_np(IOPOL_TYPE_DISK, IOPOL_SCOPE_THREAD
 						, m_settings.low_prio_disk ? IOPOL_THROTTLE : IOPOL_DEFAULT);
 #elif defined IOPRIO_WHO_PROCESS
-					syscall(ioprio_set, IOPRIO_WHO_PROCESS, getpid());
+					syscall(ioprio_set, IOPRIO_WHO_PROCESS, getpid(), IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE
+						, m_settings.get_bool(settings_pack::low_prio_disk) ? 7: 0));
 #endif
 					if (m_settings.cache_size == -1)
 					{