diff --git a/cpu/cpu_riscv64.go b/cpu/cpu_riscv64.go
new file mode 100644
index 000000000..efe2b7a84
--- /dev/null
+++ b/cpu/cpu_riscv64.go
@@ -0,0 +1,9 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build riscv64
+
+package cpu
+
+const cacheLineSize = 32