diff --git a/xs/src/libslic3r/PlaceholderParser.cpp b/xs/src/libslic3r/PlaceholderParser.cpp
index 060252387b9..06a378ed7f7 100644
--- a/xs/src/libslic3r/PlaceholderParser.cpp
+++ b/xs/src/libslic3r/PlaceholderParser.cpp
@@ -622,7 +622,7 @@ namespace client
             spirit::double_type         double_;
             spirit::ascii::string_type  string;
             spirit::repository::qi::iter_pos_type iter_pos;
-            auto                        kw = spirit::repository::qi::distinct(qi::copy(alnum | '_'));
+            auto                        kw = spirit::repository::qi::distinct(boost::proto::deep_copy(alnum | '_'));
 
             qi::_val_type               _val;
             qi::_1_type                 _1;
diff --git a/xs/src/slic3r/GUI/GUI.cpp b/xs/src/slic3r/GUI/GUI.cpp
index 63cc7749d46..9166f111ce6 100644
--- a/xs/src/slic3r/GUI/GUI.cpp
+++ b/xs/src/slic3r/GUI/GUI.cpp
@@ -98,11 +98,14 @@ std::vector<std::string> scan_serial_ports()
 #else
     // UNIX and OS X
     std::initializer_list<const char*> prefixes { "ttyUSB" , "ttyACM", "tty.", "cu.", "rfcomm" };
-    for (auto &dir_entry : boost::filesystem::directory_iterator(boost::filesystem::path("/dev"))) {
-        std::string name = dir_entry.path().filename().string();
+    boost::filesystem::directory_iterator end_iter;
+    for (boost::filesystem::directory_iterator dir_entry(boost::filesystem::path("/dev"));
+        dir_entry != end_iter;
+        ++dir_entry) {
+        std::string name = dir_entry->path().filename().string();
         for (const char *prefix : prefixes) {
             if (boost::starts_with(name, prefix)) {
-                out.emplace_back(dir_entry.path().string());
+                out.emplace_back(dir_entry->path().string());
                 break;
             }
         }
diff --git a/xs/src/slic3r/GUI/Preset.cpp b/xs/src/slic3r/GUI/Preset.cpp
index e4b0448cf29..51e4ed1ef81 100644
--- a/xs/src/slic3r/GUI/Preset.cpp
+++ b/xs/src/slic3r/GUI/Preset.cpp
@@ -251,14 +251,17 @@ void PresetCollection::load_presets(const std::string &dir_path, const std::stri
     m_presets.erase(m_presets.begin()+1, m_presets.end());
     t_config_option_keys keys = this->default_preset().config.keys();
     std::string errors_cummulative;
-	for (auto &dir_entry : boost::filesystem::directory_iterator(dir))
-        if (boost::filesystem::is_regular_file(dir_entry.status()) && boost::algorithm::iends_with(dir_entry.path().filename().string(), ".ini")) {
-            std::string name = dir_entry.path().filename().string();
+    boost::filesystem::directory_iterator end_iter;
+    for (boost::filesystem::directory_iterator dir_entry(dir);
+         dir_entry != end_iter;
+         ++dir_entry)
+            if (boost::filesystem::is_regular_file(dir_entry->status()) && boost::algorithm::iends_with(dir_entry->path().filename().string(), ".ini")) {
+            std::string name = dir_entry->path().filename().string();
             // Remove the .ini suffix.
             name.erase(name.size() - 4);
             try {
                 Preset preset(m_type, name, false);
-                preset.file = dir_entry.path().string();
+                preset.file = dir_entry->path().string();
                 preset.load(keys);
                 m_presets.emplace_back(preset);
             } catch (const std::runtime_error &err) {