diff --git a/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp b/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
index e5fc9d5ff..8070cf27b 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
@@ -544,7 +544,6 @@ RENDER_AGAIN:
     }
 
     m_imgui->disabled_begin(! m_enable_hollowing);
-    float max_tooltip_width = ImGui::GetFontSize() * 20.0f;
     ImGui::AlignTextToFramePadding();
     m_imgui->text(m_desc.at("offset"));
     ImGui::SameLine(settings_sliders_left, m_imgui->get_item_spacing().x);