diff --git a/src/slic3r/GUI/Gizmos/GLGizmoText.cpp b/src/slic3r/GUI/Gizmos/GLGizmoText.cpp
index 80546b816..c42b38c81 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoText.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoText.cpp
@@ -781,8 +781,7 @@ void GLGizmoText::on_render_input_window(float x, float y, float bottom_limit)
     ImGui::PushItemWidth(list_width);
     float old_value = m_thickness;
     ImGui::InputFloat("###text_thickness", &m_thickness, 0.0f, 0.0f, "%.2f");
-    if (m_thickness < 0.1f)
-        m_thickness = 0.1f;
+    m_thickness = ImClamp(m_thickness, m_thickness_min, m_thickness_max);
     if (old_value != m_thickness)
         m_need_update_text = true;
 
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoText.hpp b/src/slic3r/GUI/Gizmos/GLGizmoText.hpp
index 8196d2414..58d9e8447 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoText.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoText.hpp
@@ -26,6 +26,8 @@ private:
     bool m_bold = true;
     bool m_italic = false;
     float m_thickness = 2.f;
+    float m_thickness_min = 0.f;
+    float m_thickness_max = 999.99f;
     float m_embeded_depth = 0.f;
     float m_rotate_angle = 0;
     float m_text_gap = 0.f;