structure comparison functions
diff --git a/skeletons/NativeReal.h b/skeletons/NativeReal.h
index 884ff69..a307722 100644
--- a/skeletons/NativeReal.h
+++ b/skeletons/NativeReal.h
@@ -21,6 +21,7 @@
 
 asn_struct_free_f  NativeReal_free;
 asn_struct_print_f NativeReal_print;
+asn_struct_compare_f NativeReal_compare;
 ber_type_decoder_f NativeReal_decode_ber;
 der_type_encoder_f NativeReal_encode_der;
 xer_type_decoder_f NativeReal_decode_xer;