diff --git a/utils/shadow/Makefile b/utils/shadow/Makefile
index ad9bb1155..d56be8271 100644
--- a/utils/shadow/Makefile
+++ b/utils/shadow/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2008-2014 OpenWrt.org
+# Copyright (C) 2008-2015 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=shadow
 PKG_VERSION:=4.2.1
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://pkg-shadow.alioth.debian.org/releases
diff --git a/utils/shadow/patches/004-fix-su-controoling-term.patch b/utils/shadow/patches/004-fix-su-controoling-term.patch
new file mode 100644
index 000000000..4c130c736
--- /dev/null
+++ b/utils/shadow/patches/004-fix-su-controoling-term.patch
@@ -0,0 +1,16 @@
+--- a/src/su.c
++++ b/src/su.c
+@@ -1090,8 +1090,12 @@
+ 
+ 		if (fd >= 0) {
+ 			err = ioctl (fd, TIOCNOTTY, (char *) 0);
++			if (-1 == err && ENOTTY == errno) {
++				/* There are no controlling terminal already */
++				err = 0;
++			}
+ 			(void) close (fd);
+-		} else if (ENXIO == errno) {
++		} else if (ENXIO == errno || EACCES == errno) {
+ 			/* There are no controlling terminal already */
+ 			err = 0;
+ 		}