diff --git a/src/cargo/core/compiler/job_queue/mod.rs b/src/cargo/core/compiler/job_queue/mod.rs
index 0607a830596..38fdbff6357 100644
--- a/src/cargo/core/compiler/job_queue/mod.rs
+++ b/src/cargo/core/compiler/job_queue/mod.rs
@@ -964,7 +964,7 @@ impl<'gctx> DrainState<'gctx> {
     }
 
     fn emit_log_messages(
-        &mut self,
+        &self,
         unit: &Unit,
         build_runner: &mut BuildRunner<'_, '_>,
         show_warnings: bool,