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diff --git a/codegen/src/fold.rs b/codegen/src/fold.rs
index b9f31bb..21e8f3b 100644
--- a/codegen/src/fold.rs
+++ b/codegen/src/fold.rs
@@ -248,7 +248,7 @@
             ///
             /// See the [module documentation] for details.
             ///
-            /// [module documentation]: index.html
+            /// [module documentation]: self
             ///
             /// *This trait is available if Syn is built with the `"fold"` feature.*
             pub trait Fold {
diff --git a/codegen/src/visit.rs b/codegen/src/visit.rs
index 122d57e..5d6fbee 100644
--- a/codegen/src/visit.rs
+++ b/codegen/src/visit.rs
@@ -222,7 +222,7 @@
             ///
             /// See the [module documentation] for details.
             ///
-            /// [module documentation]: index.html
+            /// [module documentation]: self
             ///
             /// *This trait is available if Syn is built with the `"visit"` feature.*
             pub trait Visit<'ast> {
diff --git a/codegen/src/visit_mut.rs b/codegen/src/visit_mut.rs
index 2ec2961..4cfb2be 100644
--- a/codegen/src/visit_mut.rs
+++ b/codegen/src/visit_mut.rs
@@ -221,7 +221,7 @@
             ///
             /// See the [module documentation] for details.
             ///
-            /// [module documentation]: index.html
+            /// [module documentation]: self
             ///
             /// *This trait is available if Syn is built with the `"visit-mut"` feature.*
             pub trait VisitMut {