diff --git a/src/slic3r/GUI/DoubleSliderForLayers.cpp b/src/slic3r/GUI/DoubleSliderForLayers.cpp
index 4ca62c07ee..d27a5ac435 100644
--- a/src/slic3r/GUI/DoubleSliderForLayers.cpp
+++ b/src/slic3r/GUI/DoubleSliderForLayers.cpp
@@ -561,7 +561,6 @@ void DSForLayers::render_edit_menu()
     if (!m_show_edit_menu)
         return;
 
-    const ImVec2 icon_sz = ImVec2(14, 14);
     if (m_ticks.has_tick(m_ctrl.GetActivePos()) && ImGui::BeginPopup("edit_menu_popup")) {
         std::set<TickCode>::iterator it = m_ticks.ticks.find(TickCode{ m_ctrl.GetActivePos()});
 
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 03ed13f2d6..54dc1d148d 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -387,7 +387,6 @@ void MainFrame::update_layout()
                                  layout   == ESettingsLayout::Dlg       ? State::toDlg      : State::noUpdate;
 #endif //__WXMSW__
 
-    ESettingsLayout old_layout = m_layout;
     m_layout = layout;
 
     // From the very beginning the Print settings should be selected
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index a2955acc96..99e9b9bf9c 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -836,7 +836,7 @@ std::pair<BoundingBoxf3, Transform3d> Selection::get_bounding_box_in_reference_s
             // workaround to avoid a crash, see spe-2295 -> Crash when re-cutting with dowel connectors
             const int obj_id = vol.object_idx();
             const int vol_id = vol.volume_idx();
-            if (m_model->objects[obj_id]->volumes.size() <= vol_id)
+            if (int(m_model->objects[obj_id]->volumes.size()) <= vol_id)
                 continue;
             mesh = &m_model->objects[vol.object_idx()]->volumes[vol.volume_idx()]->mesh();
         }