diff --git a/src/main.rs b/src/main.rs
index 91a499a6dc7..16376a6869b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,6 +16,7 @@
 //! code completion, and enables renaming and refactorings.
 
 #![feature(rustc_private, integer_atomics, drain_filter)]
+#![feature(crate_visibility_modifier)] // needed for edition 2018
 #![allow(unknown_lints)]
 #![warn(clippy, rust_2018_idioms)]
 #![allow(