diff --git a/spm.h b/spm.h
index fa0c5f0fa2e49df4366acedb9ec845fbf71d01eb..524ba72dbef999a20963c645ab69580bbaf1a68b 100644
--- a/spm.h
+++ b/spm.h
@@ -138,6 +138,7 @@ pastix_int_t  spmSymmetrize( pastix_spm_t *spm );
 pastix_spm_t *spmCheckAndCorrect( pastix_spm_t *spm );
 
 pastix_spm_t *spmExpand(const pastix_spm_t* spm);
+pastix_spm_t *spmDofExtend( const int type, const int dof, const pastix_spm_t *spm );
 
 int spmReadDriver( pastix_driver_t  driver,
                    char            *filename,