diff --git a/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp b/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
index c02b64df6..d35b38bcf 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
@@ -357,7 +357,7 @@ void GLGizmoFlatten::update_planes()
             planes.pop_back();
         }
     };
-    const int plane_count = 10;
+    const int plane_count = 20;
     for (size_t i = 0; i < m_planes.size(); i++) {
         if (m_planes[i].area < experted_minimal_area) {
             if (i + 1 >= plane_count) {