Index: Linux-PAM-1.5.2/modules/pam_console/handlers.c
===================================================================
--- Linux-PAM-1.5.2.orig/modules/pam_console/handlers.c
+++ Linux-PAM-1.5.2/modules/pam_console/handlers.c
@@ -28,6 +28,7 @@
 #include <sys/types.h>
 #include <pwd.h>
 #include <syslog.h>
+#include <grp.h>
 
 #include "handlers.h"
 #include "pam_console.h"