diff --git a/libical.changes b/libical.changes
index 9fb0f20..37a5a07 100644
--- a/libical.changes
+++ b/libical.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Feb  3 19:04:34 UTC 2015 - coolo@suse.com
+
+- add reproducible-generator.patch from debian bug report to
+  get reproducible builds (and predicatable API actually)
+
 -------------------------------------------------------------------
 Fri Dec 26 20:45:25 UTC 2014 - badshah400@gmail.com
 
diff --git a/libical.spec b/libical.spec
index 8b39d4d..c4e2c42 100644
--- a/libical.spec
+++ b/libical.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libical
 #
-# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -26,6 +26,7 @@ Group:          Development/Libraries/C and C++
 Url:            http://sourceforge.net/projects/freeassociation/
 Source:         https://github.com/libical/libical/releases/download/v%{version}/%{name}-%{version}.tar.gz
 Source2:        baselibs.conf
+Patch0:         reproducible-generator.patch
 BuildRequires:  cmake >= 2.4
 BuildRequires:  gcc-c++
 BuildRequires:  pkg-config
@@ -86,6 +87,7 @@ component properties, parameters, and subcomponents.
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 %cmake
diff --git a/reproducible-generator.patch b/reproducible-generator.patch
new file mode 100644
index 0000000..947ea1f
--- /dev/null
+++ b/reproducible-generator.patch
@@ -0,0 +1,17 @@
+Description: Sort keys to generate reproducible source code.
+Author: Dimitri John Ledkov <dimitri.j.ledkov@linux.intel.com>
+Bug-Debian: http://bugs.debian.org/773916
+
+Index: libical-1.0.1/scripts/mkderivedvalues.pl
+===================================================================
+--- libical-1.0.1.orig/scripts/mkderivedvalues.pl
++++ libical-1.0.1/scripts/mkderivedvalues.pl
+@@ -141,7 +141,7 @@ if($opt_c){
+   my $count = scalar(keys %h) + 1;
+   print "static const struct icalvalue_kind_map value_map[$count]={\n"; 
+ 
+-  foreach $value  (keys %h) {
++  foreach $value  (sort keys %h) {
+ 
+     next if $value eq 'NO' or $value eq 'ANY';
+