diff --git a/src/slic3r/GUI/GUI_Utils.hpp b/src/slic3r/GUI/GUI_Utils.hpp
index 39b68ea7a..c47714e46 100644
--- a/src/slic3r/GUI/GUI_Utils.hpp
+++ b/src/slic3r/GUI/GUI_Utils.hpp
@@ -64,6 +64,12 @@ public:
         m_prev_scale_factor = m_scale_factor;
 		m_normal_font = get_default_font_for_dpi(dpi);
 
+        /* Because of default window font is a primary display font, 
+         * We should set correct font for window before getting em_unit value.
+         */
+#ifndef __WXOSX__ // Don't call SetFont under OSX to avoid name cutting in ObjectList 
+        this->SetFont(m_normal_font);
+#endif
         // initialize default width_unit according to the width of the one symbol ("m") of the currently active font of this window.
         m_em_unit = std::max<size_t>(10, this->GetTextExtent("m").x - 1);
 
@@ -139,19 +145,7 @@ private:
     // check if new scale is differ from previous
     bool    is_new_scale_factor() const { return fabs(m_scale_factor - m_prev_scale_factor) > 0.001; }
 
-    // recursive function for scaling fonts for all controls in Window
-    void    scale_controls_fonts(wxWindow *window, const float scale_f)
-    {
-        auto children = window->GetChildren();
-
-        for (auto child : children) {
-            scale_controls_fonts(child, scale_f);
-            child->SetFont(child->GetFont().Scaled(scale_f));
-        }
-
-        window->Layout();
-    }
-
+    // function for a font scaling of the window
     void    scale_win_font(wxWindow *window, const int font_point_size)
     {
         wxFont new_font(window->GetFont());
@@ -175,22 +169,18 @@ private:
     void    rescale(const wxRect &suggested_rect)
     {
         this->Freeze();
-//        const float relative_scale_factor = m_scale_factor / m_prev_scale_factor;
 
         // rescale fonts of all controls
-//        scale_controls_fonts(this, relative_scale_factor);
         scale_controls_fonts(this, m_new_font_point_size);
-
-//        this->SetFont(this->GetFont().Scaled(relative_scale_factor));
+        // rescale current window font
         scale_win_font(this, m_new_font_point_size);
 
 
-        // rescale normal_font value
-//         m_normal_font = m_normal_font.Scaled(relative_scale_factor);
+        // set normal application font as a current window font
         m_normal_font = this->GetFont();
 
-        // An analog of em_unit value from GUI_App.
-        m_em_unit = std::max<size_t>(10, 10 * m_scale_factor);
+        // update em_unit value for new window font
+        m_em_unit = std::max<size_t>(10, this->GetTextExtent("m").x - 1);
 
         // rescale missed controls sizes and images
         on_dpi_changed(suggested_rect);
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 7e5b3ec05..47d012fdf 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -38,10 +38,12 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_S
 {
     // Fonts were created by the DPIFrame constructor for the monitor, on which the window opened.
     wxGetApp().update_fonts(this);
+/*
 #ifndef __WXOSX__ // Don't call SetFont under OSX to avoid name cutting in ObjectList 
     this->SetFont(this->normal_font());
 #endif
-
+    // Font is already set in DPIFrame constructor
+*/
     // Load the icon either from the exe, or from the ico file.
 #if _WIN32
     {