diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index 2a013b867..cd5f83396 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -2392,7 +2392,7 @@ static bool _HasExt(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) {
+        if (info.ams_id == VIRTUAL_AMS_MAIN_ID_STR || info.ams_id == VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
             return true;
         }
     }
@@ -2402,7 +2402,7 @@ static bool _HasExt(const std::vector<FilamentInfo> &ams_mapping_result) {
 
 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) {
+        if (info.ams_id != VIRTUAL_AMS_MAIN_ID_STR && info.ams_id != VIRTUAL_AMS_DEPUTY_ID_STR && !info.ams_id.empty()) {
             return true;
         }
     }