Use oxford comma
diff --git a/src/attributes/codegen.md b/src/attributes/codegen.md
index 50b32f6..d472c4d 100644
--- a/src/attributes/codegen.md
+++ b/src/attributes/codegen.md
@@ -493,7 +493,7 @@
Further documentation on these features can be found in their respective
specification. Many specifications are described in the [RISC-V ISA Manual],
-[version 20250508] or in another manual hosted on the [RISC-V GitHub Account].
+[version 20250508], or in another manual hosted on the [RISC-V GitHub Account].
[RISC-V ISA Manual]: https://github.com/riscv/riscv-isa-manual
[version 20250508]: https://github.com/riscv/riscv-isa-manual/tree/20250508
