diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index d61d4ccad4de..eefc953f5ca4 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2018-12-18  Jonathan Wakely  <jwakely@redhat.com>
 
+	* src/filesystem/std-dir.cc (filesystem::_Dir::advance): Append
+	string to lvalue to avoid creating temporary path.
+
 	* include/bits/fs_path.h (path::compare(const string_type&))
 	(path::compare(const value_type*)): Add noexcept and construct a
 	string view to compare to instead of a path.
diff --git a/libstdc++-v3/src/filesystem/std-dir.cc b/libstdc++-v3/src/filesystem/std-dir.cc
index 038f635a712a..216182a2e56c 100644
--- a/libstdc++-v3/src/filesystem/std-dir.cc
+++ b/libstdc++-v3/src/filesystem/std-dir.cc
@@ -61,7 +61,9 @@ struct fs::_Dir : _Dir_base
   {
     if (const auto entp = _Dir_base::advance(skip_permission_denied, ec))
       {
-	entry = fs::directory_entry{path / entp->d_name, get_file_type(*entp)};
+	auto name = path;
+	name /= entp->d_name;
+	entry = fs::directory_entry{name, get_file_type(*entp)};
 	return true;
       }
     else if (!ec)