further runtime support for information object classes
diff --git a/skeletons/NativeReal.c b/skeletons/NativeReal.c
index d9eac63..f305d8b 100644
--- a/skeletons/NativeReal.c
+++ b/skeletons/NativeReal.c
@@ -377,9 +377,8 @@
 }
 
 void
-NativeReal_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) {
-
-	if(!td || !ptr)
+NativeReal_free(const asn_TYPE_descriptor_t *td, void *ptr, int contents_only) {
+    if(!td || !ptr)
 		return;
 
 	ASN_DEBUG("Freeing %s as REAL (%d, %p, Native)",