diff --git a/src/Common/OvercommitTracker.h b/src/Common/OvercommitTracker.h
index ddc6bd9c151..9b6364d91c1 100644
--- a/src/Common/OvercommitTracker.h
+++ b/src/Common/OvercommitTracker.h
@@ -60,8 +60,8 @@ protected:
 
     // This mutex is used to disallow concurrent access
     // to picked_tracker and cancelation_state variables.
-    mutable std::mutex overcommit_m;
-    mutable std::condition_variable cv;
+    std::mutex overcommit_m;
+    std::condition_variable cv;
 
     std::chrono::microseconds max_wait_time;