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-rw-r--r--src/lib/time/tvdiff.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/lib/time/tvdiff.c b/src/lib/time/tvdiff.c
index cfd1ace771..6af12501c7 100644
--- a/src/lib/time/tvdiff.c
+++ b/src/lib/time/tvdiff.c
@@ -3,6 +3,11 @@
* Copyright (c) 2007-2018, The Tor Project, Inc. */
/* See LICENSE for licensing information */
+/**
+ * \file tvdiff.c
+ * \brief Compute the difference between timevals, in various units.
+ **/
+
#include "lib/time/tvdiff.h"
#include "lib/cc/compat_compiler.h"