diff --git a/src/librustc/error_codes.rs b/src/librustc/error_codes.rs
index 3e35add9616bd..f5ff92e69bc7a 100644
--- a/src/librustc/error_codes.rs
+++ b/src/librustc/error_codes.rs
@@ -335,7 +335,7 @@ This works because `Box` is a pointer, so its size is well-known.
 "##,
 
 E0080: r##"
-This error indicates that the compiler was unable to sensibly evaluate an
+This error indicates that the compiler was unable to sensibly evaluate a
 constant expression that had to be evaluated. Attempting to divide by 0
 or causing integer overflow are two ways to induce this error. For example: