diff --git a/src/librustc_error_codes/error_codes/E0117.md b/src/librustc_error_codes/error_codes/E0117.md
index 7fa211d4a27d4..0544667cccaea 100644
--- a/src/librustc_error_codes/error_codes/E0117.md
+++ b/src/librustc_error_codes/error_codes/E0117.md
@@ -1,4 +1,4 @@
-The `Drop` trait was implemented on a non-struct type.
+Only traits defined in the current crate can be implemented for arbitrary types.
 
 Erroneous code example: