diff --git a/src/librustc_error_codes/error_codes/E0749.md b/src/librustc_error_codes/error_codes/E0749.md
index 7a1a745b53c1..74cd2903f6d0 100644
--- a/src/librustc_error_codes/error_codes/E0749.md
+++ b/src/librustc_error_codes/error_codes/E0749.md
@@ -11,6 +11,7 @@ trait MyTrait {
 impl !MyTrait for u32 {
     type Foo = i32; // error!
 }
+// impl !MyTrait for u32 {} // fix
 # fn main() {}
 ```