diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 51b245e36ba..636ace01ea8 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -285,7 +285,7 @@ pub(crate) fn create_config(
         diagnostic_output: DiagnosticOutput::Default,
         lint_caps,
         parse_sess_created: None,
-        register_lints: Some(box crate::lint::register_lints),
+        register_lints: Some(Box::new(crate::lint::register_lints)),
         override_queries: Some(|_sess, providers, _external_providers| {
             // Most lints will require typechecking, so just don't run them.
             providers.lint_mod = |_, _| {};