diff --git a/libical-1.0-r1156.patch b/libical-1.0-r1156.patch
new file mode 100644
index 0000000..208a078
--- /dev/null
+++ b/libical-1.0-r1156.patch
@@ -0,0 +1,12 @@
+diff -up libical-1.0/scripts/mkderivedvalues.pl.sort libical-1.0/scripts/mkderivedvalues.pl
+--- libical-1.0/scripts/mkderivedvalues.pl.sort	2013-11-21 14:46:33.330067572 +0100
++++ libical-1.0/scripts/mkderivedvalues.pl	2013-11-21 14:46:47.037211733 +0100
+@@ -63,7 +63,7 @@ if($opt_h){
+   print "typedef enum icalvalue_kind {\n";
+   print "   ICAL_ANY_VALUE=$idx,\n";
+ 
+-  foreach $value  (keys %h) {
++  foreach $value  (sort keys %h) {
+     
+     $idx++;
+     my $ucv = join("",map {uc(lc($_));}  split(/-/,$value));
diff --git a/libical.spec b/libical.spec
index f7993c0..5f0f701 100644
--- a/libical.spec
+++ b/libical.spec
@@ -1,11 +1,12 @@
 Summary:	Reference implementation of the iCalendar data type and serialization format
 Name:		libical
 Version:	1.0
-Release:	3%{?dist}
+Release:	4%{?dist}
 License:	LGPLv2 or MPLv1.1
 URL:		http://freeassociation.sourceforge.net/
 Source:		http://downloads.sourceforge.net/freeassociation/%{name}-%{version}.tar.gz
 Patch0:		libical-1.0-r1150.patch
+Patch1:		libical-1.0-r1156.patch
 
 BuildRequires:	bison, byacc, flex
 BuildRequires:	cmake
@@ -26,6 +27,7 @@ applications that use libical.
 %prep
 %setup -q
 %patch0 -p1 -b .r1150
+%patch1 -p1 -b .r1156
 
 %build
 mkdir -p %{_target_platform}
@@ -62,6 +64,9 @@ rm -fv %{buildroot}%{_libdir}/lib*.*a
 %{_includedir}/libical/
 
 %changelog
+* Thu Nov 21 2013 Milan Crha <mcrha@redhat.com> - 1.0-4
+- Add patch to fix icalvalue_kind enum generation (RH bug #1023020)
+
 * Sun Oct 20 2013 Robert Scheck <robert@fedoraproject.org> 1.0-3
 - Fixed timezone issue with evolution-data-server (#1021136)