diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp
index d0148f2510..4989d12eed 100644
--- a/src/slic3r/GUI/GUI_Preview.cpp
+++ b/src/slic3r/GUI/GUI_Preview.cpp
@@ -705,8 +705,17 @@ void Preview::update_layers_slider(const std::vector<double>& layers_z, bool kee
         m_layers_slider->SetLayersTimes(print_mode_stat.layers_times, print_mode_stat.time);
     }
 
+    // check if ticks_info_from_model contains ColorChange g-code
+    bool color_change_already_exists = false;
+    for (const CustomGCode::Item& gcode: ticks_info_from_model.gcodes)
+        if (gcode.type == CustomGCode::Type::ColorChange) {
+            color_change_already_exists = true;
+            break;
+        }
+
     // Suggest the auto color change, if model looks like sign
-    if (wxGetApp().app_config->get("allow_auto_color_change") == "1" && 
+    if (!color_change_already_exists &&
+        wxGetApp().app_config->get("allow_auto_color_change") == "1" && 
         m_layers_slider->IsNewPrint())
     {
         const Print& print = wxGetApp().plater()->fff_print();