diff --git a/src/common/thread.h b/src/common/thread.h
index 741dce4872..2cf74452d7 100644
--- a/src/common/thread.h
+++ b/src/common/thread.h
@@ -73,7 +73,7 @@ public:
 private:
     std::condition_variable condvar;
     std::mutex mutex;
-    const std::size_t count;
+    std::size_t count;
     std::size_t waiting = 0;
     std::size_t generation = 0; // Incremented once each time the barrier is used
 };