diff --git a/tbb.spec b/tbb.spec
index 7868929..98d442e 100644
--- a/tbb.spec
+++ b/tbb.spec
@@ -1,7 +1,7 @@
 %define pkg_version %(echo %version | tr -d .)
 
 Name:          tbb
-Version:       2019_U9
+Version:       2020
 Release:       1mamba
 Summary:       The Threading Building Blocks library abstracts low-level threading details
 Group:         Development/Tools
@@ -85,13 +85,8 @@ for file in libtbb{,malloc}; do
 done
 popd
 
-mkdir -p %{buildroot}%{_includedir}/tbb/{compat,machine}
-
-pushd include
-  install -pm 644 tbb/*.h %{buildroot}%{_includedir}/tbb/
-  install -pm 644 tbb/compat/*.h %{buildroot}%{_includedir}/tbb/compat/
-  install -pm 644 tbb/machine/*.h %{buildroot}%{_includedir}/tbb/machine/
-popd
+mkdir -p %{buildroot}%{_includedir}
+cp -a include/tbb %{buildroot}%{_includedir}
 
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -109,9 +104,12 @@ popd
 %files -n lib%{name}-devel
 %defattr(-,root,root)
 %dir %{_includedir}/tbb
+%{_includedir}/tbb/index.html
 %{_includedir}/tbb/*.h
 %dir %{_includedir}/tbb/compat
-%{_includedir}/tbb/compat/*.h
+%{_includedir}/tbb/compat/*
+%dir %{_includedir}/tbb/internal
+%{_includedir}/tbb/internal/*.h
 %dir %{_includedir}/tbb/machine
 %{_includedir}/tbb/machine/*.h
 %{_libdir}/libtbb.so
@@ -125,6 +123,9 @@ popd
 %doc Getting_Started.pdf Reference.pdf Tutorial.pdf
 
 %changelog
+* Wed Dec 25 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 2020-1mamba
+- update to 2020
+
 * Wed Dec 11 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 2019_U9-1mamba
 - update to 2019_U9