diff --git a/iso-c-90.patch b/iso-c-90.patch
new file mode 100644
index 0000000..5703ac4
--- /dev/null
+++ b/iso-c-90.patch
@@ -0,0 +1,17 @@
+diff -ur python-systemd-234.orig/systemd/_daemon.c python-systemd-234/systemd/_daemon.c
+--- python-systemd-234.orig/systemd/_daemon.c	2017-03-26 03:33:59.000000000 +0200
++++ python-systemd-234/systemd/_daemon.c	2017-11-06 19:11:48.546733677 +0100
+@@ -127,11 +127,12 @@
+                         return NULL;
+ 
+                 for (i = 0; i < len; i++) {
++                        long value;
+                         PyObject *item = PySequence_GetItem(fds, i);
+                         if (!item)
+                                 return NULL;
+ 
+-                        long value = PyLong_AsLong(item);
++			value = PyLong_AsLong(item);
+                         if (PyErr_Occurred())
+                                 return NULL;
+ 
diff --git a/python-systemd.changes b/python-systemd.changes
index c0d4d16..b45dbf5 100644
--- a/python-systemd.changes
+++ b/python-systemd.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Nov  6 18:15:19 UTC 2017 - jweberhofer@weberhofer.at
+
+- iso-c-90.patch added to fix building on SLE12-SP3
+
 -------------------------------------------------------------------
 Sat Oct  7 13:20:19 UTC 2017 - sebix+novell.com@sebix.at
 
diff --git a/python-systemd.spec b/python-systemd.spec
index 975be43..54b298b 100644
--- a/python-systemd.spec
+++ b/python-systemd.spec
@@ -26,6 +26,8 @@ License:        LGPL-2.1+
 Group:          Development/Languages/Python
 Url:            https://github.com/systemd/python-systemd
 Source:         https://github.com/systemd/%{name}/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
+# PATCH-FIX-OPENSUSE iso-c-90.patch makes the building iso-c-90 compatible to allow building on SLE12 SP3
+Patch1:         iso-c-90.patch
 # PATCH-FIX-OPENSUSE exclude-tests-on-obs.patch removes a test when running tests at OBS. Should be removed as soon as OBS is fixed
 Patch100:       exclude-tests-on-obs.patch
 BuildRequires:  %{python_module devel}
@@ -62,6 +64,7 @@ Documentation and help files for python-systemd.
 
 %prep
 %setup -q
+%patch1 -p1
 %patch100 -p1
 
 %build