diff --git a/src/slic3r/GUI/PartPlate.cpp b/src/slic3r/GUI/PartPlate.cpp
index c6520f3c7..bc328c029 100644
--- a/src/slic3r/GUI/PartPlate.cpp
+++ b/src/slic3r/GUI/PartPlate.cpp
@@ -95,7 +95,7 @@ void PartPlate::load_render_colors()
 
 
 PartPlate::PartPlate()
-	: ObjectBase(-1), m_plater(nullptr), m_model(nullptr), m_quadric(nullptr),last_bed_type(BedType::btCount)
+	: ObjectBase(-1), m_plater(nullptr), m_model(nullptr), m_quadric(nullptr)
 {
 	assert(this->id().invalid());
 	init();
@@ -166,25 +166,15 @@ void PartPlate::set_bed_type(BedType bed_type)
 	assert(m_plater != nullptr);
 
     // update slice state
-    if (last_bed_type == BedType::btDefault){
-        if (bed_type != BedType::btDefault) {
-            // get global bed type
-            BedType global_bed_type = wxGetApp().preset_bundle->project_config.opt_enum<BedType>("curr_bed_type");
-            if (global_bed_type != bed_type)
-                update_slice_result_valid_state(false);
-        }
+    BedType old_real_bed_type = get_bed_type();
+    BedType new_real_bed_type = bed_type;
+    if (bed_type == BedType::btDefault) {
+        DynamicConfig& proj_cfg = wxGetApp().preset_bundle->project_config;
+        if (proj_cfg.has(bed_type_key))
+            new_real_bed_type = proj_cfg.opt_enum<BedType>(bed_type_key);
     }
-    else{
-        if (bed_type == BedType::btDefault) {
-            // get global bed type
-            BedType global_bed_type = wxGetApp().preset_bundle->project_config.opt_enum<BedType>("curr_bed_type");
-            if (last_bed_type != global_bed_type)
-                update_slice_result_valid_state(false);
-        }
-        else {
-            if (last_bed_type != bed_type)
-                update_slice_result_valid_state(false);
-        }
+    if (old_real_bed_type != new_real_bed_type) {
+        update_slice_result_valid_state(false);
     }
 
 	if (bed_type == BedType::btDefault)
@@ -192,8 +182,6 @@ void PartPlate::set_bed_type(BedType bed_type)
 	else
 		m_config.set_key_value("curr_bed_type", new ConfigOptionEnum<BedType>(bed_type));
 
-	last_bed_type = bed_type;
-
 	if (m_plater)
         m_plater->update_project_dirty_from_presets();
 }
diff --git a/src/slic3r/GUI/PartPlate.hpp b/src/slic3r/GUI/PartPlate.hpp
index 8bf5a490f..9bbffd8ce 100644
--- a/src/slic3r/GUI/PartPlate.hpp
+++ b/src/slic3r/GUI/PartPlate.hpp
@@ -213,7 +213,6 @@ public:
     //clear alll the instances in plate
     void clear(bool clear_sliced_result = true);
 
-    BedType last_bed_type;
     BedType get_bed_type(bool check_global = true) const;
     void set_bed_type(BedType bed_type);
     void reset_bed_type();