diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 83bf2b92e0b..77605730bad 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2018-06-21  François Dumont  <fdumont@gcc.gnu.org>
+
+	* include/debug/debug.h
+	(_Safe_iterator<>(const _Safe_iterator<_MutableIterator,>& __x)):
+	Compare __x base iterator with a default initialized iterator of the
+	same type.
+
 2018-06-20  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/70966
diff --git a/libstdc++-v3/include/debug/safe_iterator.h b/libstdc++-v3/include/debug/safe_iterator.h
index 7ed2b93b407..b8256fc3a22 100644
--- a/libstdc++-v3/include/debug/safe_iterator.h
+++ b/libstdc++-v3/include/debug/safe_iterator.h
@@ -180,7 +180,7 @@ namespace __gnu_debug
 	  // _GLIBCXX_RESOLVE_LIB_DEFECTS
 	  // DR 408. Is vector<reverse_iterator<char*> > forbidden?
 	  _GLIBCXX_DEBUG_VERIFY(!__x._M_singular()
-				|| __x.base() == _Iterator(),
+				|| __x.base() == _MutableIterator(),
 				_M_message(__msg_init_const_singular)
 				._M_iterator(*this, "this")
 				._M_iterator(__x, "other"));