diff --git a/mumps.changes b/mumps.changes
index fa3663d..96aab49 100644
--- a/mumps.changes
+++ b/mumps.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Aug 21 17:40:15 UTC 2012 - scorot@free.fr
+
+- split devel packages with devel and scotch-devel 
+- devel packages don't require scotch-devel anymore
+
 -------------------------------------------------------------------
 Mon Aug 20 23:09:48 UTC 2012 - scorot@free.fr
 
diff --git a/mumps.spec b/mumps.spec
index 5c49fa3..cf1c9f1 100644
--- a/mumps.spec
+++ b/mumps.spec
@@ -83,8 +83,6 @@ Group:          Development/Libraries/Other
 Requires:       blas-devel
 Requires:       lapack-devel
 Requires:       mumps = %{version}
-Requires:       mumps-scotch = %{version}
-Requires:       scotch-devel
 
 %description devel
 MUMPS implements a direct solver for large sparse linear systems, with a
@@ -92,6 +90,22 @@ particular focus on symmetric positive definite matrices.  It can
 operate on distributed matrices e.g. over a cluster.  It has Fortran and
 C interfaces, and can interface with ordering tools such as Scotch.
 
+
+%package scotch-devel
+Summary:        Files needed for developing mumps based applications
+Group:          Development/Libraries/Other
+Requires:       blas-devel
+Requires:       lapack-devel
+Requires:       mumps = %{version}
+Requires:       mumps-scotch = %{version}
+
+
+%description scotch-devel
+MUMPS implements a direct solver for large sparse linear systems, with a
+particular focus on symmetric positive definite matrices.  It can
+operate on distributed matrices e.g. over a cluster.  It has Fortran and
+C interfaces, and can interface with ordering tools such as Scotch.
+
 %package openmpi
 Summary:        A MUltifrontal Massively Parallel Sparse direct Solver
 Group:          System/Libraries
@@ -412,8 +426,13 @@ rm -rf %{buildroot}
 %defattr(-,root,root,-)
 %{_includedir}/mumps
 %{_includedir}/pord
-%{_libdir}/*.so
-%{_libdir}/*.a
+%{_libdir}/*_seq.so
+%{_libdir}/*_seq.a
+
+%files scotch-devel
+%defattr(-,root,root,-)
+%{_libdir}/*_scotch.so
+%{_libdir}/*_scotch.a
 
 %files openmpi
 %defattr(-,root,root,-)