diff --git a/src/slic3r/GUI/BedShapeDialog.cpp b/src/slic3r/GUI/BedShapeDialog.cpp
index 3721f3ca0..46a8fc910 100644
--- a/src/slic3r/GUI/BedShapeDialog.cpp
+++ b/src/slic3r/GUI/BedShapeDialog.cpp
@@ -75,6 +75,8 @@ BedShape::BedShape(const ConfigOptionPoints& points)
             // all vertices are equidistant to center
             m_type      = Type::Circular;
             m_diameter  = unscale<double>(avg_dist * 2);
+            //round
+            m_diameter = std::round(1000 * m_diameter) / 1000.;
 
             return;
         }