diff --git a/include/libtorrent/session_settings.hpp b/include/libtorrent/session_settings.hpp
index 2038c0d85..eb0ab8225 100644
--- a/include/libtorrent/session_settings.hpp
+++ b/include/libtorrent/session_settings.hpp
@@ -129,6 +129,8 @@ namespace libtorrent
 			, use_read_cache(true)
 			, disk_io_write_mode(0)
 			, disk_io_read_mode(0)
+			, coalesce_reads(false)
+			, coalesce_writes(false)
 			, outgoing_ports(0,0)
 			, peer_tos(0)
 			, active_downloads(8)
diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index cac66a7cb..45c2f3079 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -644,6 +644,8 @@ namespace aux {
 			|| m_settings.disk_cache_algorithm != s.disk_cache_algorithm
 			|| m_settings.read_cache_line_size != s.read_cache_line_size
 			|| m_settings.write_cache_line_size != s.write_cache_line_size
+			|| m_settings.coalesce_writes != s.coalesce_writes
+			|| m_settings.coalesce_reads != s.coalesce_reads
 #ifndef TORRENT_DISABLE_MLOCK
 			|| m_settings.lock_disk_cache != s.lock_disk_cache
 #endif