diff --git a/src/librustc_error_codes/error_codes/E0646.md b/src/librustc_error_codes/error_codes/E0646.md
index e01dbae8b9060..1e9ec7d4380ad 100644
--- a/src/librustc_error_codes/error_codes/E0646.md
+++ b/src/librustc_error_codes/error_codes/E0646.md
@@ -1,4 +1,5 @@
 It is not possible to define `main` with a where clause.
+
 Erroneous code example:
 
 ```compile_fail,E0646