diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index 37c5971101..8aad2b4b56 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -2266,8 +2266,32 @@ void SelectMachineDialog::update_option_opts(MachineObject *obj)
     update_options_layout();
 }
 
+static bool _HasExt(const std::vector<FilamentInfo> &ams_mapping_result) {
+    if (ams_mapping_result.empty()) {
+        return true;
+    };
+
+    for (const auto &info : ams_mapping_result) {
+        if (info.ams_id == VIRTUAL_AMS_MAIN_ID_STR || info.ams_id == VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+static bool _HasAms(const std::vector<FilamentInfo> &ams_mapping_result) {
+    for (const auto &info : ams_mapping_result) {
+        if (info.ams_id != VIRTUAL_AMS_MAIN_ID_STR && info.ams_id != VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 bool SelectMachineDialog::is_enable_external_change_assist(std::vector<FilamentInfo>& ams_mapping_result) {
-    if (m_print_job && m_print_job->task_use_ams) return false;
+    if (_HasAms(ams_mapping_result)) return false;
 
     std::map<std::string, int> v_ams_map;
     v_ams_map[VIRTUAL_AMS_MAIN_ID_STR] = 0;
@@ -2339,30 +2363,6 @@ void SelectMachineDialog::Enable_Auto_Refill(bool enable)
     m_ams_backup_tip->Refresh();
 }
 
-static bool _HasExt(const std::vector<FilamentInfo> &ams_mapping_result) {
-    if (ams_mapping_result.empty()) {
-        return true;
-    };
-
-    for (const auto &info : ams_mapping_result) {
-        if (info.ams_id == VIRTUAL_AMS_MAIN_ID_STR || info.ams_id == VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
-            return true;
-        }
-    }
-
-    return false;
-}
-
-static bool _HasAms(const std::vector<FilamentInfo> &ams_mapping_result) {
-    for (const auto &info : ams_mapping_result) {
-        if (info.ams_id != VIRTUAL_AMS_MAIN_ID_STR && info.ams_id != VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
-            return true;
-        }
-    }
-
-    return false;
-}
-
 void SelectMachineDialog::on_send_print()
 {
     BOOST_LOG_TRIVIAL(info) << "print_job: on_ok to send";