diff --git a/lxml-fix-attribute-quoting.patch b/lxml-fix-attribute-quoting.patch
new file mode 100644
index 0000000..fd3e039
--- /dev/null
+++ b/lxml-fix-attribute-quoting.patch
@@ -0,0 +1,95 @@
+Index: lxml-3.7.3/src/lxml/tests/test_incremental_xmlfile.py
+===================================================================
+--- lxml-3.7.3.orig/src/lxml/tests/test_incremental_xmlfile.py
++++ lxml-3.7.3/src/lxml/tests/test_incremental_xmlfile.py
+@@ -430,7 +430,7 @@ class HtmlFileTestCase(_XmlFileTestCaseB
+             with xf.element("tagname", attrib={"attr": _str('"misquöted\\u3344\\U00013344"')}):
+                 xf.write("foo")
+ 
+-        self.assertXml('<tagname attr="&quot;misqu&#246;ted&#13124;&#78660;&quot;">foo</tagname>')
++        self.assertXml('<tagname attr="&quot;misqu&#xF6;ted&#x3344;&#x13344;&quot;">foo</tagname>')
+ 
+     def test_unescaped_script(self):
+         with etree.htmlfile(self._file) as xf:
+Index: lxml-3.7.3/src/lxml/serializer.pxi
+===================================================================
+--- lxml-3.7.3.orig/src/lxml/serializer.pxi
++++ lxml-3.7.3/src/lxml/serializer.pxi
+@@ -481,6 +481,7 @@ cdef unsigned char *xmlSerializeHexCharR
+ cdef _write_attr_string(tree.xmlOutputBuffer* buf, const char *string):
+     cdef const char *base
+     cdef const char *cur
++    cdef const unsigned char *ucur
+ 
+     cdef unsigned char tmp[12]
+     cdef int val = 0
+@@ -546,42 +547,44 @@ cdef _write_attr_string(tree.xmlOutputBu
+             cur += 1
+             base = cur
+ 
+-        elif (cur[0] >= 0x80) and (cur[1] != 0):
++        elif (<const unsigned char>cur[0] >= 0x80) and (cur[1] != 0):
+ 
+             if (base != cur):
+                 tree.xmlOutputBufferWrite(buf, cur - base, base)
+ 
+-            if (cur[0] < 0xC0):
++            ucur = <const unsigned char *>cur
++
++            if (ucur[0] < 0xC0):
+                 # invalid UTF-8 sequence
+-                val = cur[0]
++                val = ucur[0]
+                 l = 1
+ 
+-            elif (cur[0] < 0xE0):
+-                val = (cur[0]) & 0x1F
++            elif (ucur[0] < 0xE0):
++                val = (ucur[0]) & 0x1F
+                 val <<= 6
+-                val |= (cur[1]) & 0x3F
++                val |= (ucur[1]) & 0x3F
+                 l = 2
+ 
+-            elif ((cur[0] < 0xF0) and (cur[2] != 0)):
+-                val = (cur[0]) & 0x0F
++            elif ((ucur[0] < 0xF0) and (ucur[2] != 0)):
++                val = (ucur[0]) & 0x0F
+                 val <<= 6
+-                val |= (cur[1]) & 0x3F
++                val |= (ucur[1]) & 0x3F
+                 val <<= 6
+-                val |= (cur[2]) & 0x3F
++                val |= (ucur[2]) & 0x3F
+                 l = 3
+ 
+-            elif ((cur[0] < 0xF8) and (cur[2] != 0) and (cur[3] != 0)):
+-                val = (cur[0]) & 0x07
++            elif ((ucur[0] < 0xF8) and (ucur[2] != 0) and (ucur[3] != 0)):
++                val = (ucur[0]) & 0x07
+                 val <<= 6
+-                val |= (cur[1]) & 0x3F
++                val |= (ucur[1]) & 0x3F
+                 val <<= 6
+-                val |= (cur[2]) & 0x3F
++                val |= (ucur[2]) & 0x3F
+                 val <<= 6
+-                val |= (cur[3]) & 0x3F
++                val |= (ucur[3]) & 0x3F
+                 l = 4
+             else:
+                 # invalid UTF-8 sequence
+-                val = cur[0]
++                val = ucur[0]
+                 l = 1
+ 
+             if ((l == 1) or (not tree.xmlIsCharQ(val))):
+@@ -590,7 +593,7 @@ cdef _write_attr_string(tree.xmlOutputBu
+             # We could do multiple things here. Just save
+             # as a char ref
+             xmlSerializeHexCharRef(tmp, val)
+-            tree.xmlOutputBufferWrite(buf, -1, <const char*> tmp)
++            tree.xmlOutputBufferWrite(buf, len(tmp), <const char*> tmp)
+             cur += l
+             base = cur
+ 
diff --git a/python-lxml.changes b/python-lxml.changes
index 750e82a..548b5ba 100644
--- a/python-lxml.changes
+++ b/python-lxml.changes
@@ -1,7 +1,10 @@
 -------------------------------------------------------------------
-Fri Apr  7 18:20:52 UTC 2017 - jmatejek@suse.com
+Tue Apr 11 16:29:04 UTC 2017 - jmatejek@suse.com
 
 - temporarily disable Source URL for pdf doc (it became unavailable)
+- lxml-fix-attribute-quoting.patch - stabilize attribute entity encoding
+  across platforms
+- force-regenerate C code from Cython sources
 
 -------------------------------------------------------------------
 Wed Mar  8 18:55:12 UTC 2017 - axel.braun@gmx.de
diff --git a/python-lxml.spec b/python-lxml.spec
index 9a2f662..ef33215 100644
--- a/python-lxml.spec
+++ b/python-lxml.spec
@@ -27,6 +27,8 @@ Url:            https://lxml.de/
 Source:         https://files.pythonhosted.org/packages/source/l/lxml/lxml-%{version}.tar.gz
 #Source1:        https://lxml.de/lxmldoc-%{version}.pdf
 Source1:        lxmldoc-%{version}.pdf
+# PATCH-FIX-UPSTREAM fix attribute quoting inactive code https://github.com/lxml/lxml/pull/238
+Patch0:         lxml-fix-attribute-quoting.patch
 BuildRequires:  %{python_module Cython >= 0.22.1}
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module setuptools >= 18.0.1}
@@ -75,16 +77,22 @@ This package contains header files needed to use lxml's C API.
 %prep
 %setup -q -n lxml-%{version}
 cp %{SOURCE1} .
+%patch0 -p1
+
+# remove generated files
+rm src/lxml/lxml.etree.c
+rm src/lxml/lxml.etree.h
+rm src/lxml/lxml.etree_api.h
+rm src/lxml/lxml.objectify.c
 
 %build
 export CFLAGS="%{optflags}"
-%python_build
+%python_build --with-cython
 
 %check
 # The tests fail on SLE 11 due to broken incremental parsing
 # in libxml2
 export CFLAGS="%{optflags}"
-%python_exec setup.py build_ext --inplace
 LANG=en_US.UTF-8 PYTHONUNBUFFERED=x make test
 LANG=en_US.UTF-8 PYTHONUNBUFFERED=x make test3