diff --git a/lib/asn1/gen_locl.h b/lib/asn1/gen_locl.h
index 92795e009..9eea76aef 100644
--- a/lib/asn1/gen_locl.h
+++ b/lib/asn1/gen_locl.h
@@ -66,6 +66,7 @@ void generate_type_free (Symbol *s);
 void generate_type_length (Symbol *s);
 void generate_type_copy (Symbol *s);
 void generate_type_maybe (Symbol *s);
+void generate_glue (Symbol *s);
 
 void init_generate (char *filename, char *basename);
 void close_generate(void);