diff a/src/hotspot/cpu/riscv/templateTable_riscv.hpp b/src/hotspot/cpu/riscv/templateTable_riscv.hpp
--- a/src/hotspot/cpu/riscv/templateTable_riscv.hpp
+++ b/src/hotspot/cpu/riscv/templateTable_riscv.hpp
@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  * Copyright (c) 2020, 2021, Huawei Technologies Co., Ltd. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,6 +32,8 @@
                                  Register flags);
 
 // Helpers
 static void index_check(Register array, Register index);
 
+static void invoke_is_substitutable(Register aobj, Register bobj, Label& is_subst, Label& not_subst);
+
 #endif // CPU_RISCV_TEMPLATETABLE_RISCV_HPP