diff --git a/ChangeLog b/ChangeLog
index daf1e98f5..0f9a265a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,7 @@
    tests would fail because the pidfile could not be read by a regular user.
    "cat: cannot open ...../regress/pidfile: Permission denied (error 13)"
    Make sure cat is run by $SUDO.  no objection from me. djm@
+ - (tim) [auth.c] add cast to quiet compiler. Change only affects SVR5 systems.
 
 20100809
  - (djm) bz#1561: don't bother setting IFF_UP on tun(4) device if it is
diff --git a/auth.c b/auth.c
index a27667f42..dba1e6555 100644
--- a/auth.c
+++ b/auth.c
@@ -143,7 +143,7 @@ allowed_user(struct passwd * pw)
 			locked = 1;
 #endif
 #ifdef USE_LIBIAF
-		free(passwd);
+		free((void *) passwd);
 #endif /* USE_LIBIAF */
 		if (locked) {
 			logit("User %.100s not allowed because account is locked",