diff --git a/src/libslic3r/Config.cpp b/src/libslic3r/Config.cpp
index 75a71acb0e..63e2b3821e 100644
--- a/src/libslic3r/Config.cpp
+++ b/src/libslic3r/Config.cpp
@@ -37,6 +37,7 @@
 #include <boost/foreach.hpp>
 #include <boost/lexical_cast.hpp>
 #include <boost/nowide/cenv.hpp>
+#include <boost/nowide/cstdio.hpp>
 #include <boost/nowide/iostream.hpp>
 #include <boost/nowide/fstream.hpp>
 #include <boost/property_tree/ini_parser.hpp>
diff --git a/src/slic3r/GUI/EditGCodeDialog.hpp b/src/slic3r/GUI/EditGCodeDialog.hpp
index 39757ab376..b54b9cc045 100644
--- a/src/slic3r/GUI/EditGCodeDialog.hpp
+++ b/src/slic3r/GUI/EditGCodeDialog.hpp
@@ -13,6 +13,7 @@
 class wxListBox;
 class wxTextCtrl;
 class ScalableButton;
+class wxStaticText;
 
 namespace Slic3r {
 
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index c60e58d47f..282f0d0185 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -28,6 +28,7 @@
 #include <regex>
 #include <future>
 #include <boost/algorithm/string.hpp>
+#include <boost/nowide/cstdio.hpp>
 #include <boost/optional.hpp>
 #include <boost/filesystem/fstream.hpp>
 #include <boost/filesystem/path.hpp>
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index ee7af794db..f318f84959 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -2456,7 +2456,7 @@ void TabFilament::load_current_preset()
             m_extruders_cb->Select(m_active_extruder);
     }
 
-    assert(m_active_extruder >= 0 && m_active_extruder < m_preset_bundle->extruders_filaments.size());
+    assert(m_active_extruder >= 0 && size_t(m_active_extruder) < m_preset_bundle->extruders_filaments.size());
     const std::string& selected_extr_filament_name = m_preset_bundle->extruders_filaments[m_active_extruder].get_selected_preset_name();
     if (selected_extr_filament_name != selected_filament_name) {
         m_presets->select_preset_by_name(selected_extr_filament_name, false);