diff --git a/compiler/rustc_error_codes/src/error_codes/E0210.md b/compiler/rustc_error_codes/src/error_codes/E0210.md
index dc2fd9b0ca049..41263e5e3f5ac 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0210.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0210.md
@@ -76,7 +76,5 @@ Let `Ti` be the first such type.
 For information on the design of the orphan rules,
 see [RFC 2451] and [RFC 1023].
 
-For information on the design of the orphan rules, see [RFC 1023].
-
 [RFC 2451]: https://rust-lang.github.io/rfcs/2451-re-rebalancing-coherence.html
 [RFC 1023]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md