diff --git a/cpp/oneapi/dal/detail/threading.hpp b/cpp/oneapi/dal/detail/threading.hpp
index 31e4a0631d4..a67d525855a 100644
--- a/cpp/oneapi/dal/detail/threading.hpp
+++ b/cpp/oneapi/dal/detail/threading.hpp
@@ -472,6 +472,8 @@ class scoped_lock {
     }
     scoped_lock(const scoped_lock &) = delete;
     scoped_lock(scoped_lock &&) = delete;
+    scoped_lock &operator=(scoped_lock &other) = delete;
+    scoped_lock &operator=(scoped_lock &&other) = delete;
     ~scoped_lock() {
         mutex_.unlock();
     }