diff --git a/src/librustc_lint/lib.rs b/src/librustc_lint/lib.rs
index 4f6d23dce6d..074fa914f37 100644
--- a/src/librustc_lint/lib.rs
+++ b/src/librustc_lint/lib.rs
@@ -178,7 +178,7 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
                     UNUSED_PARENS);
 
     add_lint_group!(sess,
-                    "rust_2018_idioms",
+                    "rust_2018_migration",
                     BARE_TRAIT_OBJECT,
                     UNREACHABLE_PUB);