--- /dev/null
+diff -ruNp proftpd-1.3.5.orig/src/wtmp.c proftpd-1.3.5/src/wtmp.c
+--- proftpd-1.3.5.orig/src/wtmp.c 2013-12-09 20:16:15.000000000 +0100
++++ proftpd-1.3.5/src/wtmp.c 2015-04-03 11:47:21.710554599 +0200
+@@ -136,11 +136,33 @@ int log_wtmp(const char *line, const cha
+ struct utmp ut;
+ static int fd = -1;
+
++#if defined(HAVE_UTMPX_H)
++#if !defined(WTMPX_FILE) && defined(_PATH_WTMPX)
++# define WTMPX_FILE _PATH_WTMPX
++#endif
++ static char *wtmp_file = NULL;
++ if (wtmp_file == NULL) {
++ if (access(WTMPX_FILE"x", F_OK) == 0)
++ wtmp_file = WTMPX_FILE"x";
++ else if (access(WTMPX_FILE, F_OK) == 0)
++ wtmp_file = WTMPX_FILE;
++ else if (access(WTMP_FILE"x", F_OK) == 0)
++ wtmp_file = WTMP_FILE"x";
++ else if (access(WTMP_FILE, F_OK) == 0)
++ wtmp_file = WTMP_FILE;
++ else {
++ pr_log_pri(PR_LOG_WARNING, "cannot find "WTMPX_FILE);
++ return -1;
++ }
++ }
++#else
++ static char *wtmp_file = WTMP_FILE;
++#endif
+ if (fd < 0 &&
+- (fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
++ (fd = open(wtmp_file, O_WRONLY|O_APPEND, 0)) < 0) {
+ int xerrno = errno;
+
+- pr_log_pri(PR_LOG_WARNING, "failed to open wtmp %s: %s", WTMP_FILE,
++ pr_log_pri(PR_LOG_WARNING, "failed to open wtmp %s: %s", wtmp_file,
+ strerror(xerrno));
+
+ errno = xerrno;