diff --git a/src/common/encnames.c b/src/common/encnames.c
index 12b61cd3db..2086e007fc 100644
--- a/src/common/encnames.c
+++ b/src/common/encnames.c
@@ -1,8 +1,14 @@
-/*
- * Encoding names and routines for work with it. All
- * in this file is shared between FE and BE.
+/*-------------------------------------------------------------------------
  *
- * src/backend/utils/mb/encnames.c
+ * encnames.c
+ *	  Encoding names and routines for working with them.
+ *
+ * Portions Copyright (c) 2001-2020, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *	  src/common/encnames.c
+ *
+ *-------------------------------------------------------------------------
  */
 #ifdef FRONTEND
 #include "postgres_fe.h"
diff --git a/src/common/wchar.c b/src/common/wchar.c
index 02e2588ffe..74a88239a1 100644
--- a/src/common/wchar.c
+++ b/src/common/wchar.c
@@ -1,10 +1,15 @@
-/*
- * conversion functions between pg_wchar and multibyte streams.
- * Tatsuo Ishii
- * src/backend/utils/mb/wchar.c
+/*-------------------------------------------------------------------------
  *
+ * wchar.c
+ *	  Functions for working with multibyte characters in various encodings.
+ *
+ * Portions Copyright (c) 1998-2020, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *	  src/common/wchar.c
+ *
+ *-------------------------------------------------------------------------
  */
-/* can be used in either frontend or backend */
 #ifdef FRONTEND
 #include "postgres_fe.h"
 #else