diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index 7a6629c456..f4df504896 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -2989,7 +2989,18 @@ int MachineObject::parse_json(std::string payload, bool key_field_only)
                 }
             }
             if (j_pre["print"].contains("plate_idx")){ // && m_plate_index == -1
-                m_plate_index = j_pre["print"]["plate_idx"].get<int>();
+                if (j_pre["print"]["plate_idx"].is_number())
+                {
+                    m_plate_index = j_pre["print"]["plate_idx"].get<int>();
+                }
+                else if (j_pre["print"]["plate_idx"].is_string())
+                {
+                    try
+                    {
+                        m_plate_index = std::stoi(j_pre["print"]["plate_idx"].get<std::string>());
+                    }
+                    catch (...) { BOOST_LOG_TRIVIAL(error) << "parse_json: failed to convert plate_idx to int"; }
+                }
             }
         }
         if (j_pre.contains("system")) {