Update link to sql_function in documentation
@@ -18,7 +18,7 @@ pub use self::query_builder::SqliteQueryBuilder;
///
/// This trait is to be used in conjunction with the `sql_function!`
/// macro for defining a custom SQLite aggregate function. See
-/// the documentation [there](../../diesel_derives/macro.sql_function_proc.html) for details.
+/// the documentation [there](../prelude/macro.sql_function.html) for details.
pub trait SqliteAggregateFunction<Args>: Default {
/// The result type of the SQLite aggregate function
type Output;
