diff --git a/src/librustc_driver/driver.rs b/src/librustc_driver/driver.rs
index c4d8a66aa6d..858a5602e7b 100644
--- a/src/librustc_driver/driver.rs
+++ b/src/librustc_driver/driver.rs
@@ -17,6 +17,7 @@ use rustc_allocator as allocator;
 use rustc_borrowck as borrowck;
 use rustc_codegen_utils::codegen_backend::CodegenBackend;
 use rustc_data_structures::sync::{self, Lock};
+#[cfg(parallel_compiler)]
 use rustc_data_structures::jobserver;
 use rustc_incremental;
 use rustc_metadata::creader::CrateLoader;