diff --git a/en_US.ISO8859-1/articles/pam/pam_unix.c b/en_US.ISO8859-1/articles/pam/pam_unix.c
index 59ca4c28dc..37d170a1df 100644
--- a/en_US.ISO8859-1/articles/pam/pam_unix.c
+++ b/en_US.ISO8859-1/articles/pam/pam_unix.c
@@ -3,9 +3,9 @@
  * All rights reserved.
  *
  * This software was developed for the FreeBSD Project by ThinkSec AS and
- * NAI Labs, the Security Research Division of Network Associates, Inc.
- * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
- * DARPA CHATS research program.
+ * Network Associates Laboratories, the Security Research Division of
+ * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
+ * ("CBOSS"), as part of the DARPA CHATS research program.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -31,7 +31,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $P4: //depot/projects/openpam/modules/pam_unix/pam_unix.c#1 $
+ * $P4: //depot/projects/openpam/modules/pam_unix/pam_unix.c#3 $
  * $FreeBSD$
  */
 
@@ -44,6 +44,7 @@
 #include <unistd.h>
 
 #include <security/pam_modules.h>
+#include <security/pam_appl.h>
 
 #ifndef _OPENPAM
 static char password_prompt[] = "Password:";