OER encoding of pure NULLs verified
diff --git a/skeletons/constr_CHOICE_oer.c b/skeletons/constr_CHOICE_oer.c
index 2cd6a1c..ca5674d 100644
--- a/skeletons/constr_CHOICE_oer.c
+++ b/skeletons/constr_CHOICE_oer.c
@@ -357,7 +357,7 @@
 
     er = elm->type->op->oer_encoder(elm->type, elm->encoding_constraints.oer_constraints, memb_ptr,
                                     cb, app_key);
-    if(er.encoded > 0)
+    if(er.encoded >= 0)
         er.encoded += tag_len;
 
     return er;