diff --git a/stl/inc/memory b/stl/inc/memory
index b65377e6390..13cd2bd7a72 100644
--- a/stl/inc/memory
+++ b/stl/inc/memory
@@ -2670,7 +2670,8 @@ private:
 
         this->~_Ref_count_unbounded_array_alloc();
 
-        _Al.deallocate(_STD _Refancy<_Alloc_ptr_t<_Rebound_alloc>>(reinterpret_cast<_Storage*>(this)), _Storage_units);
+        _Al.deallocate(_STD _Refancy<_Alloc_ptr_t<_Rebound_alloc>>(reinterpret_cast<_Storage*>(this)),
+            static_cast<_Alloc_size_t<_Rebound_alloc>>(_Storage_units));
     }
 };
 
@@ -2851,11 +2852,12 @@ struct _Allocate_n_ptr {
     _Alloc_ptr_t<_Alloc> _Ptr;
     size_t _Nx;
 
-    _Allocate_n_ptr(_Alloc& _Al_, const size_t _Nx_) : _Al(_Al_), _Ptr(_Al_.allocate(_Nx_)), _Nx(_Nx_) {}
+    _Allocate_n_ptr(_Alloc& _Al_, const size_t _Nx_)
+        : _Al(_Al_), _Ptr(_Al_.allocate(_Convert_size<_Alloc_size_t<_Alloc>>(_Nx_))), _Nx(_Nx_) {}
 
     ~_Allocate_n_ptr() {
         if (_Ptr) {
-            _Al.deallocate(_Ptr, _Nx);
+            _Al.deallocate(_Ptr, static_cast<_Alloc_size_t<_Alloc>>(_Nx));
         }
     }