diff --git a/libasn1fix/asn1fix_constraint.h b/libasn1fix/asn1fix_constraint.h
index cc6621f..9e692ef 100644
--- a/libasn1fix/asn1fix_constraint.h
+++ b/libasn1fix/asn1fix_constraint.h
@@ -4,8 +4,7 @@
 /*
  * Resolve referenced values inside constraints.
  */
-int asn1constraint_resolve(arg_t *arg, asn1p_module_t *module,
-	asn1p_constraint_t *ct,
+int asn1constraint_resolve(arg_t *arg, asn1p_constraint_t *ct,
 	asn1p_expr_type_e topmost_parent_expression_type,
 	enum asn1p_constraint_type_e effective_constraint_type);