diff --git a/libcxx/include/memory b/libcxx/include/memory
--- a/libcxx/include/memory
+++ b/libcxx/include/memory
@@ -2641,7 +2641,11 @@
 
 
   _LIBCPP_INLINE_VISIBILITY
-  ~unique_ptr() { reset(); }
+  ~unique_ptr() {
+    const pointer __ptr = __ptr_.first();
+    if (__ptr)
+        __ptr_.second()(__ptr);
+  }
 
   _LIBCPP_INLINE_VISIBILITY
   unique_ptr& operator=(nullptr_t) _NOEXCEPT {
@@ -2864,7 +2868,11 @@
 
 public:
   _LIBCPP_INLINE_VISIBILITY
-  ~unique_ptr() { reset(); }
+  ~unique_ptr() {
+    const pointer __ptr = __ptr_.first();
+    if (__ptr)
+        __ptr_.second()(__ptr);
+  }
 
   _LIBCPP_INLINE_VISIBILITY
   unique_ptr& operator=(nullptr_t) _NOEXCEPT {