diff --git a/skeletons/NULL.c b/skeletons/NULL.c
index 961f3e6..f82f5e4 100644
--- a/skeletons/NULL.c
+++ b/skeletons/NULL.c
@@ -153,12 +153,15 @@
 NULL_encode_oer(asn_TYPE_descriptor_t *td,
                 const asn_oer_constraints_t *constraints, void *sptr,
                 asn_app_consume_bytes_f *cb, void *app_key) {
+    asn_enc_rval_t er;
 
     (void)constraints;
     (void)cb;
     (void)app_key;
 
-    ASN__ENCODE_FAILED;
+    er.encoded = 0; /* Encoding in 0 bytes. */
+
+    ASN__ENCODED_OK(er);
 }
 
 #endif /* ASN_DISABLE_OER_SUPPORT */