diff --git a/util/tsig.c b/util/tsig.c
index 4e774d891..f8a40fdee 100644
--- a/util/tsig.c
+++ b/util/tsig.c
@@ -36,7 +36,7 @@
 /**
  * \file
  *
- * This file contains functions for dealing with TSIG records and signatures.
+ * This file provides functions to create and verify TSIG RRs.
  */
 
 #include "config.h"
diff --git a/util/tsig.h b/util/tsig.h
index f0f10f99b..21bb18878 100644
--- a/util/tsig.h
+++ b/util/tsig.h
@@ -36,7 +36,7 @@
 /**
  * \file
  *
- * This file contains functions for dealing with TSIG records and signatures.
+ * This file provides functions to create and verify TSIG RRs.
  */
 
 #ifndef UTIL_TSIG_H