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diff --git a/compiler/rustc_error_codes/src/error_codes/E0329.md b/compiler/rustc_error_codes/src/error_codes/E0329.md
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+#### Note: this error code is no longer emitted by the compiler.
+
+An attempt was made to access an associated constant through either a generic
+type parameter or `Self`. This is not supported yet. An example causing this
+error is shown below:
+
+```
+trait Foo {
+    const BAR: f64;
+}
+
+struct MyStruct;
+
+impl Foo for MyStruct {
+    const BAR: f64 = 0f64;
+}
+
+fn get_bar_bad<F: Foo>(t: F) -> f64 {
+    F::BAR
+}
+```
+
+Currently, the value of `BAR` for a particular type can only be accessed
+through a concrete type, as shown below:
+
+```
+trait Foo {
+    const BAR: f64;
+}
+
+struct MyStruct;
+
+impl Foo for MyStruct {
+    const BAR: f64 = 0f64;
+}
+
+fn get_bar_good() -> f64 {
+    <MyStruct as Foo>::BAR
+}
+```