diff --git a/man3/catopen.3 b/man3/catopen.3
index a2b2e8616..00d00dca4 100644
--- a/man3/catopen.3
+++ b/man3/catopen.3
@@ -23,7 +23,7 @@
 .\" Modified Thu Dec 13 22:51:19 2001 by Martin Schulze <joey@infodrom.org>
 .\" Modified 2001-12-14 aeb
 .\"
-.TH CATOPEN 3 2001-12-14
+.TH CATOPEN 3 2001-12-14 "GNU" "Linux Programmer's Manual"
 .SH NAME
 catopen, catclose \- open/close a message catalog
 .SH SYNOPSIS