diff --git a/specification/v0_10/README.md b/specification/v0_10/README.md
index f7926d039..781c51b38 100644
--- a/specification/v0_10/README.md
+++ b/specification/v0_10/README.md
@@ -9,6 +9,6 @@ If you have proposed changes or new features, please open an issue or submit a p
 ## Documentation
 
 - [Protocol](docs/a2ui_protocol.md)
-- [Custom Functions](docs/custom_functions.md)
+- [Custom Functions](docs/a2ui_custom_functions.md)
 - [Extension Specification](docs/a2ui_extension_specification.md)
 - [Evolution Guide](docs/evolution_guide.md)