diff --git a/include/llvm/ADT/BitVector.h b/include/llvm/ADT/BitVector.h
index 0dbe810d904..f58dd7356c7 100644
--- a/include/llvm/ADT/BitVector.h
+++ b/include/llvm/ADT/BitVector.h
@@ -53,7 +53,7 @@ public:
       BitPos = Idx % BITWORD_SIZE;
     }
 
-    ~reference() {}
+    reference(const reference&) = default;
 
     reference &operator=(reference t) {
       *this = bool(t);
diff --git a/include/llvm/ADT/SmallBitVector.h b/include/llvm/ADT/SmallBitVector.h
index 22e8ccd8ea0..ae3d645396f 100644
--- a/include/llvm/ADT/SmallBitVector.h
+++ b/include/llvm/ADT/SmallBitVector.h
@@ -66,6 +66,8 @@ public:
   public:
     reference(SmallBitVector &b, unsigned Idx) : TheVector(b), BitPos(Idx) {}
 
+    reference(const reference&) = default;
+
     reference& operator=(reference t) {
       *this = bool(t);
       return *this;