diff --git a/include/llvm/Support/Allocator.h b/include/llvm/Support/Allocator.h
index 034661f4bcd..617ab9fd7a3 100644
--- a/include/llvm/Support/Allocator.h
+++ b/include/llvm/Support/Allocator.h
@@ -99,7 +99,7 @@ public:
   /// \brief Deallocate space for one object without destroying it.
   template <typename T>
   typename std::enable_if<
-      std::is_same<typename std::remove_cv<T>::type, void>::value, void>::type
+      !std::is_same<typename std::remove_cv<T>::type, void>::value, void>::type
   Deallocate(T *Ptr) {
     Deallocate(static_cast<const void *>(Ptr));
   }
@@ -107,7 +107,7 @@ public:
   /// \brief Allocate space for an array of objects without constructing them.
   template <typename T>
   typename std::enable_if<
-      std::is_same<typename std::remove_cv<T>::type, void>::value, void>::type
+      !std::is_same<typename std::remove_cv<T>::type, void>::value, void>::type
   Deallocate(T *Ptr, size_t /*Num*/) {
     Deallocate(static_cast<const void *>(Ptr));
   }