diff --git a/src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.hpp b/src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.hpp
index e5336869e1..9475f9ba62 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.hpp
@@ -97,6 +97,8 @@ public:
     // will be also extended to support additional states, requiring at least one state to remain free out of 19 states.
     static const constexpr size_t EXTRUDERS_LIMIT = 16;
 
+    virtual const float get_cursor_radius_min() const { return CursorRadiusMin; }
+
 protected:
     std::array<float, 4> get_cursor_sphere_left_button_color() const override;
     std::array<float, 4> get_cursor_sphere_right_button_color() const override;
@@ -120,6 +122,8 @@ protected:
     std::vector<std::array<float, 4>> m_modified_extruders_colors;
     std::vector<int>                  m_original_volumes_extruder_idxs;
 
+    static const constexpr float      CursorRadiusMin = 0.1f; // cannot be zero
+
 private:
     bool on_init() override;
 
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp
index 2825913d3c..5ee0fddb1d 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp
@@ -254,8 +254,8 @@ bool GLGizmoPainterBase::gizmo_event(SLAGizmoEventType action, const Vec2d& mous
         }
         else if (alt_down) {
             if (m_tool_type == ToolType::BRUSH && (m_cursor_type == TriangleSelector::CursorType::SPHERE || m_cursor_type == TriangleSelector::CursorType::CIRCLE)) {
-                m_cursor_radius = action == SLAGizmoEventType::MouseWheelDown ? std::max(m_cursor_radius - CursorRadiusStep, CursorRadiusMin)
-                                                                              : std::min(m_cursor_radius + CursorRadiusStep, CursorRadiusMax);
+                m_cursor_radius = action == SLAGizmoEventType::MouseWheelDown ? std::max(m_cursor_radius - this->get_cursor_radius_step(), this->get_cursor_radius_min())
+                                                                              : std::min(m_cursor_radius + this->get_cursor_radius_step(), this->get_cursor_radius_max());
                 m_parent.set_as_dirty();
                 return true;
             } else if (m_tool_type == ToolType::SMART_FILL) {
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp
index 2705f82d32..ff030f19f2 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp
@@ -122,6 +122,10 @@ public:
     // after all volumes (including transparent ones) are rendered.
     virtual void render_painter_gizmo() const = 0;
 
+    virtual const float get_cursor_radius_min() const { return CursorRadiusMin; }
+    virtual const float get_cursor_radius_max() const { return CursorRadiusMax; }
+    virtual const float get_cursor_radius_step() const { return CursorRadiusStep; }
+
 protected:
     virtual void render_triangles(const Selection& selection) const;
     void render_cursor() const;