diff --git a/libcxx/include/__bit_reference b/libcxx/include/__bit_reference
--- a/libcxx/include/__bit_reference
+++ b/libcxx/include/__bit_reference
@@ -1132,10 +1132,13 @@
     __bit_iterator(__type_for_abi_non_trivial_copy_ctor const& __it) _NOEXCEPT
       : __seg_(__it.__seg_), __ctz_(__it.__ctz_) {}
 
-    // Always declare the copy assignment operator since the implicit declaration
-    // is deprecated.
     _LIBCPP_INLINE_VISIBILITY
-    __bit_iterator& operator=(__bit_iterator const&) = default;
+    __bit_iterator& operator=(__bit_iterator const& __it) _NOEXCEPT
+    {
+        __seg_ = __it.__seg_;
+        __ctz_ = __it.__ctz_;
+        return *this;
+    }
 
     _LIBCPP_INLINE_VISIBILITY reference operator*() const _NOEXCEPT
         {return reference(__seg_, __storage_type(1) << __ctz_);}
diff --git a/libcxx/utils/libcxx/test/params.py b/libcxx/utils/libcxx/test/params.py
--- a/libcxx/utils/libcxx/test/params.py
+++ b/libcxx/utils/libcxx/test/params.py
@@ -13,7 +13,6 @@
   '-Werror',
   '-Wall',
   '-Wextra',
-  '-Wno-deprecated-copy',
   '-Wshadow',
   '-Wundef',
   '-Wno-unused-command-line-argument',