diff --git a/include/memory b/include/memory
index 3fc0e5a1b..a02d61c12 100644
--- a/include/memory
+++ b/include/memory
@@ -3559,7 +3559,7 @@ template <class _Tp, class _Dp, class _Alloc>
 const void*
 __shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT
 {
-    return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : 0;
+    return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr;
 }
 
 #endif  // _LIBCPP_NO_RTTI
diff --git a/src/memory.cpp b/src/memory.cpp
index f6f6fe8da..62e7e2340 100644
--- a/src/memory.cpp
+++ b/src/memory.cpp
@@ -120,7 +120,7 @@ __shared_weak_count::lock() _NOEXCEPT
                                              object_owners+1))
             return this;
     }
-    return 0;
+    return nullptr;
 }
 
 #if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC)
@@ -128,7 +128,7 @@ __shared_weak_count::lock() _NOEXCEPT
 const void*
 __shared_weak_count::__get_deleter(const type_info&) const _NOEXCEPT
 {
-    return 0;
+    return nullptr;
 }
 
 #endif  // _LIBCPP_NO_RTTI