--- a/modules/pam_unix/pam_unix_acct.c	2011-06-21 11:04:56.000000000 +0200
+++ b/modules/pam_unix/pam_unix_acct.c	2012-07-05 16:04:35.643727485 +0200
@@ -41,6 +41,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/types.h>
+#include <sys/resource.h>
 #include <syslog.h>
 #include <pwd.h>
 #include <shadow.h>