diff --git a/libaec.spec b/libaec.spec
index b874442..2f81505 100644
--- a/libaec.spec
+++ b/libaec.spec
@@ -1,6 +1,6 @@
 Name:           libaec
 Version:        1.0.3
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Adaptive Entropy Coding library
 License:        BSD
 Url:            https://gitlab.dkrz.de/k202009/libaec
@@ -8,7 +8,7 @@ Source0:        https://gitlab.dkrz.de/k202009/libaec/-/archive/v%{version}/liba
 Source1:        http://cwe.ccsds.org/sls/docs/SLS-DC/BB121B2TestData/121B2TestData.zip
 
 BuildRequires:  gcc
-BuildRequires:  %{?fedora:cmake >= 3.1}%{?rhel:cmake3 >= 3.1}
+BuildRequires:  cmake3 >= 3.1
 
 %description
 Libaec provides fast loss-less compression of 1 up to 32 bit wide
@@ -46,6 +46,8 @@ popd
 
 %install
 %make_install -C build
+cp -a build/config.h %{buildroot}%{_includedir}/%{name}_config.h
+sed -i '/include/s/config.h/%{name}_&/' %{buildroot}%{_includedir}/szlib.h
 
 %check
 make -C build test CTEST_OUTPUT_ON_FAILURE=1
@@ -64,6 +66,9 @@ make -C build test CTEST_OUTPUT_ON_FAILURE=1
 %{_libdir}/lib*.so
 
 %changelog
+* Sat Feb 09 2019 Christoph Junghans <junghans@votca.org> - 1.0.3-3
+- Include missing header
+
 * Tue Feb 05 2019 Christoph Junghans <junghans@votca.org> - 1.0.3-2
 - Enable all tests