diff --git a/llvm/include/llvm/Support/Error.h b/llvm/include/llvm/Support/Error.h
--- a/llvm/include/llvm/Support/Error.h
+++ b/llvm/include/llvm/Support/Error.h
@@ -788,7 +788,7 @@
     : public ErrorHandlerTraits<decltype(
           &std::remove_reference<HandlerT>::type::operator())> {};
 
-// Specialization functions of the form 'Error (const ErrT&)'.
+// Specialization functions of the form 'Error (ErrT&)'.
 template <typename ErrT> class ErrorHandlerTraits<Error (&)(ErrT &)> {
 public:
   static bool appliesTo(const ErrorInfoBase &E) {
@@ -802,7 +802,7 @@
   }
 };
 
-// Specialization functions of the form 'void (const ErrT&)'.
+// Specialization functions of the form 'void (ErrT&)'.
 template <typename ErrT> class ErrorHandlerTraits<void (&)(ErrT &)> {
 public:
   static bool appliesTo(const ErrorInfoBase &E) {
@@ -850,12 +850,12 @@
   }
 };
 
-// Specialization for member functions of the form 'RetT (const ErrT&)'.
+// Specialization for member functions of the form 'RetT (ErrT&)'.
 template <typename C, typename RetT, typename ErrT>
 class ErrorHandlerTraits<RetT (C::*)(ErrT &)>
     : public ErrorHandlerTraits<RetT (&)(ErrT &)> {};
 
-// Specialization for member functions of the form 'RetT (const ErrT&) const'.
+// Specialization for member functions of the form 'RetT (ErrT&) const'.
 template <typename C, typename RetT, typename ErrT>
 class ErrorHandlerTraits<RetT (C::*)(ErrT &) const>
     : public ErrorHandlerTraits<RetT (&)(ErrT &)> {};