diff --git a/postfix-2.11.4.tar.gz b/postfix-2.11.4.tar.gz
deleted file mode 100644
index 04b861b..0000000
--- a/postfix-2.11.4.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f4154c1db58c0300897d4c430bd90714ac7855249df59cc8828910fd5ccb031e
-size 4040104
diff --git a/postfix-2.11.5.tar.gz b/postfix-2.11.5.tar.gz
new file mode 100644
index 0000000..09d15ce
--- /dev/null
+++ b/postfix-2.11.5.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0a4cc61f6d6c57eee676d4e78a42b2d29f8b0f406277d350bc0928f51efa3187
+size 4036256
diff --git a/postfix-2.11.5_linux4.patch b/postfix-2.11.5_linux4.patch
new file mode 100644
index 0000000..bb3c55d
--- /dev/null
+++ b/postfix-2.11.5_linux4.patch
@@ -0,0 +1,31 @@
+Index: postfix-2.11.5/makedefs
+===================================================================
+--- postfix-2.11.5.orig/makedefs
++++ postfix-2.11.5/makedefs
+@@ -365,7 +365,12 @@ EOF
+ 		       fi;;
+ 		esac
+ 		;;
+-    Linux.3*)	SYSTYPE=LINUX3
++    Linux.[34]*)
++		case "$RELEASE" in 
++		 3.*) SYSTYPE=LINUX3;; 
++		 4.*) SYSTYPE=LINUX4;; 
++		 *) error "Unknown Linux version: `uname -r`.";; 
++		esac 
+ 		case "$CCARGS" in
+ 		 *-DNO_DB*) ;;
+ 		 *-DHAS_DB*) ;;
+Index: postfix-2.11.5/src/util/sys_defs.h
+===================================================================
+--- postfix-2.11.5.orig/src/util/sys_defs.h
++++ postfix-2.11.5/src/util/sys_defs.h
+@@ -755,7 +755,7 @@ extern int initgroups(const char *, int)
+  /*
+   * LINUX.
+   */
+-#if defined(LINUX2) || defined(LINUX3)
++#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4)
+ #define SUPPORTED
+ #include <sys/types.h>
+ #define UINT32_TYPE	unsigned int
diff --git a/postfix.changes b/postfix.changes
index e4ab0ed..acec3d2 100644
--- a/postfix.changes
+++ b/postfix.changes
@@ -1,3 +1,28 @@
+-------------------------------------------------------------------
+Tue Apr 21 09:55:44 UTC 2015 - mrueckert@suse.de
+
+- added postfix-2.11.5_linux4.patch:
+  Allow building on kernel 4. Patch taken from:
+  https://groups.google.com/forum/#!topic/mailing.postfix.users/fufS22sMGWY
+
+-------------------------------------------------------------------
+Sun Apr 19 23:03:25 UTC 2015 - mrueckert@suse.de
+
+- update to postfix 2.11.5
+  - Bugfix (introduced: Postfix 2.6):
+    sender_dependent_relayhost_maps ignored the relayhost setting
+    in the case of a DUNNO lookup result.  It would use the
+    recipient domain instead.  Viktor Dukhovni. Wietse took the
+    pieces of code that enforce the precedence of a
+    sender-dependent relayhost, the global relayhost, and the
+    recipient domain, and put that code together in once place so
+    that it is easier to maintain.  File:
+    trivial-rewrite/resolve.c.
+  - Bitrot: prepare for future changes in OpenSSL API. Viktor
+    Dukhovni. File: tls_dane.c.
+  - Incompatibility: specifying "make makefiles" with "CC=command"
+    will no longer override the default WARN setting.
+
 -------------------------------------------------------------------
 Mon Feb  9 18:01:38 UTC 2015 - michael@stroeder.com
 
diff --git a/postfix.spec b/postfix.spec
index 1078631..a6fb956 100644
--- a/postfix.spec
+++ b/postfix.spec
@@ -52,7 +52,7 @@
 %define         _unitdir /lib/systemd
 %endif
 Name:           postfix
-Version:        2.11.4
+Version:        2.11.5
 Release:        0
 Summary:        A fast, secure, and flexible mailer
 License:        IPL-1.0
@@ -78,6 +78,7 @@ Patch100:       %{name}-vda-v13-2.10.0.patch
 Patch101:       postfix-db6.diff
 #PATCH-FIX-SLE PATCH-FIX-OPENSUSE to be able to build the agent tls_proxy
 Patch102:       add_missed_library.patch
+Patch103:       postfix-2.11.5_linux4.patch
 BuildRequires:  cyrus-sasl-devel
 BuildRequires:  db-devel
 BuildRequires:  libopenssl-devel
@@ -171,6 +172,7 @@ PostgreSQL.
 %patch100 -p1
 %patch101
 %patch102
+%patch103 -p1
 # ---------------------------------------------------------------------------
 
 %build