diff --git a/library/ecp.c b/library/ecp.c
index 52d6d9c38..bbc1ff082 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -506,7 +506,7 @@ void mbedtls_ecp_group_init( mbedtls_ecp_group *grp )
     if( grp == NULL )
         return;
 
-    grp->id = 0;
+    grp->id = MBEDTLS_ECP_DP_NONE;
     mbedtls_mpi_init( &grp->P );
     mbedtls_mpi_init( &grp->A );
     mbedtls_mpi_init( &grp->B );