diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 38f9014830a..76fc247ad1d 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
+	    Jakub Jelinek  <jakub@redhat.com>
+
+	PR libstdc++/88607
+	* include/experimental/memory: Replace UTF-8 quote characters.
+	* include/std/future: Replace UTF-8 "em dash" characters.
+
 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/88607
diff --git a/libstdc++-v3/include/experimental/memory b/libstdc++-v3/include/experimental/memory
index 955f83072b9..b8faeb23eef 100644
--- a/libstdc++-v3/include/experimental/memory
+++ b/libstdc++-v3/include/experimental/memory
@@ -63,12 +63,12 @@ inline namespace fundamentals_v2
       using __reference = add_lvalue_reference_t<_Tp>; // exposition-only
 
       // 3.2.2, observer_ptr constructors
-      // default c’tor
+      // default c'tor
       constexpr observer_ptr() noexcept
       : __t()
       { }
 
-      // pointer-accepting c’tors
+      // pointer-accepting c'tors
       constexpr observer_ptr(nullptr_t) noexcept
       : __t()
       { }
@@ -77,7 +77,7 @@ inline namespace fundamentals_v2
       : __t(__p)
       { }
 
-      // copying c’tors (in addition to compiler-generated copy c’tor)
+      // copying c'tors (in addition to compiler-generated copy c'tor)
       template <typename _Up,
 		typename = typename enable_if<
 		  is_convertible<typename add_pointer<_Up>::type, __pointer
diff --git a/libstdc++-v3/include/std/future b/libstdc++-v3/include/std/future
index 2b60c58f3bc..6cafde5ee6a 100644
--- a/libstdc++-v3/include/std/future
+++ b/libstdc++-v3/include/std/future
@@ -1629,11 +1629,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     //
     // [futures.async]:
     //
-    // — a call to a waiting function on an asynchronous return object that
+    // - a call to a waiting function on an asynchronous return object that
     // shares the shared state created by this async call shall block until
     // the associated thread has completed, as if joined, or else time out.
     //
-    // — the associated thread completion synchronizes with the return from
+    // - the associated thread completion synchronizes with the return from
     // the first function that successfully detects the ready status of the
     // shared state or with the return from the last function that releases
     // the shared state, whichever happens first.