diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index f29b687..e20a1de 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -485,6 +485,8 @@
     grp->pbits = mpi_msb( &grp->P );
     grp->nbits = mpi_msb( &grp->N );
 
+    grp->h = 1;
+
     return( 0 );
 }