diff --git a/llvm/include/llvm/ADT/iterator.h b/llvm/include/llvm/ADT/iterator.h
index 6f0c42fe08bec..c0495e24893fb 100644
--- a/llvm/include/llvm/ADT/iterator.h
+++ b/llvm/include/llvm/ADT/iterator.h
@@ -267,6 +267,8 @@ class iterator_adaptor_base
     return *static_cast<DerivedT *>(this);
   }
   using BaseT::operator-;
+  template <bool Enabled = BaseT::IsRandomAccess,
+            typename = std::enable_if_t<Enabled>>
   difference_type operator-(const DerivedT &RHS) const {
     static_assert(
         BaseT::IsRandomAccess,