diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index f277aab83..2e80ad046 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -2344,7 +2344,7 @@ namespace libtorrent
 						ret = piece_manager::fatal_disk_error;
 						break;
 					}
-					TORRENT_ASSERT(ret != -2 || !j.str.empty());
+					TORRENT_ASSERT(ret != -2 || j.error);
 					
 					// if the check is not done, add it at the end of the job queue
 					if (ret == piece_manager::need_full_check)
@@ -2400,7 +2400,7 @@ namespace libtorrent
 #ifndef BOOST_NO_EXCEPTIONS
 			try {
 #endif
-				TORRENT_ASSERT(ret != -2 || !j.str.empty()
+				TORRENT_ASSERT(ret != -2 || j.error
 					|| j.action == disk_io_job::hash);
 #if TORRENT_DISK_STATS
 				if ((j.action == disk_io_job::read || j.action == disk_io_job::read_and_hash)
diff --git a/src/torrent.cpp b/src/torrent.cpp
index a3f9ec405..4c7dfcc92 100644
--- a/src/torrent.cpp
+++ b/src/torrent.cpp
@@ -1298,7 +1298,7 @@ namespace libtorrent
 			}
 #if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
 			(*m_ses.m_logger) << time_now_string() << ": fatal disk error ["
-				" error: " << j.str <<
+				" error: " << j.error.message() <<
 				" torrent: " << torrent_file().name() <<
 				" ]\n";
 #endif