diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 97606c0a0..9e818adfa 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -3728,7 +3728,7 @@ void Plater::priv::take_snapshot(const std::string& snapshot_name)
     UndoRedo::SnapshotData snapshot_data;
     snapshot_data.printer_technology = this->printer_technology;
     if (this->view3D->is_layers_editing_enabled())
-    	snapshot_data.flags |= UndoRedo::Snapshot::VARIABLE_LAYER_EDITING_ACTIVE;
+    	snapshot_data.flags |= UndoRedo::SnapshotData::VARIABLE_LAYER_EDITING_ACTIVE;
     //FIXME updating the Wipe tower config values at the ModelWipeTower from the Print config.
     // This is a workaround until we refactor the Wipe Tower position / orientation to live solely inside the Model, not in the Print config.
     if (this->printer_technology == ptFFF) {
@@ -3794,8 +3794,8 @@ void Plater::priv::undo_redo_to(std::vector<UndoRedo::Snapshot>::const_iterator
 	UndoRedo::SnapshotData top_snapshot_data;
     top_snapshot_data.printer_technology = this->printer_technology;
     if (this->view3D->is_layers_editing_enabled())
-    	top_snapshot_data.flags |= UndoRedo::Snapshot::VARIABLE_LAYER_EDITING_ACTIVE;
-	bool   		 new_variable_layer_editing_active = (new_flags & UndoRedo::Snapshot::VARIABLE_LAYER_EDITING_ACTIVE) != 0;
+    	top_snapshot_data.flags |= UndoRedo::SnapshotData::VARIABLE_LAYER_EDITING_ACTIVE;
+	bool   		 new_variable_layer_editing_active = (new_flags & UndoRedo::SnapshotData::VARIABLE_LAYER_EDITING_ACTIVE) != 0;
 	// Disable layer editing before the Undo / Redo jump.
     if (!new_variable_layer_editing_active && view3D->is_layers_editing_enabled())
         view3D->get_canvas3d()->force_main_toolbar_left_action(view3D->get_canvas3d()->get_main_toolbar_item_id("layersediting"));
diff --git a/src/slic3r/Utils/UndoRedo.hpp b/src/slic3r/Utils/UndoRedo.hpp
index 209b5cf29..a5ebd62e8 100644
--- a/src/slic3r/Utils/UndoRedo.hpp
+++ b/src/slic3r/Utils/UndoRedo.hpp
@@ -31,6 +31,12 @@ struct SnapshotData
 	PrinterTechnology 	printer_technology = ptUnknown;
 	// Bitmap of Flags (see the Flags enum).
 	unsigned int        flags = 0;
+
+
+	// Bitmask of various binary flags to be stored with the snapshot.
+	enum Flags {
+		VARIABLE_LAYER_EDITING_ACTIVE = 1,
+	};
 };
 
 struct Snapshot
@@ -38,11 +44,6 @@ struct Snapshot
 	Snapshot(size_t timestamp) : timestamp(timestamp) {}
 	Snapshot(const std::string &name, size_t timestamp, size_t model_id, const SnapshotData &snapshot_data) :
 		name(name), timestamp(timestamp), model_id(model_id), snapshot_data(snapshot_data) {}
-
-	// Bitmask of various binary flags to be stored with the snapshot.
-	enum Flags {
-		VARIABLE_LAYER_EDITING_ACTIVE = 1,
-	};
 	
 	std::string 		name;
 	size_t 				timestamp;