diff --git a/compiler/rustc_error_codes/src/error_codes/E0782.md b/compiler/rustc_error_codes/src/error_codes/E0782.md
index b19d5209e4f..5eddd7ae8d5 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0782.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0782.md
@@ -2,7 +2,7 @@ Trait objects must include the `dyn` keyword.
 
 Erroneous code example:
 
-```edition2021,compile_fail,E782
+```edition2021,compile_fail,E0782
 trait Foo {}
 fn test(arg: Box<Foo>) {} // error!
 ```
diff --git a/compiler/rustc_error_codes/src/error_codes/E0783.md b/compiler/rustc_error_codes/src/error_codes/E0783.md
index afc82546dac..ee784be35ef 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0783.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0783.md
@@ -2,7 +2,7 @@ The range pattern `...` is no longer allowed.
 
 Erroneous code example:
 
-```edition2021,compile_fail,E783
+```edition2021,compile_fail,E0783
 match 2u8 {
     0...9 => println!("Got a number less than 10"), // error!
     _ => println!("Got a number 10 or more"),