diff --git a/include/wx/geometry.h b/include/wx/geometry.h
index 10c60516d3..7df27db674 100644
--- a/include/wx/geometry.h
+++ b/include/wx/geometry.h
@@ -157,7 +157,7 @@ inline wxDouble wxPoint2DInt::GetDistance( const wxPoint2DInt &pt ) const
 
 inline wxDouble wxPoint2DInt::GetDistanceSquare( const wxPoint2DInt &pt ) const
 {
-    return ( (pt.m_x-m_x)*(pt.m_x-m_x) + (pt.m_y-m_y)*(pt.m_y-m_y) );
+    return ( (wxDouble)(pt.m_x-m_x)*(pt.m_x-m_x) + (wxDouble)(pt.m_y-m_y)*(pt.m_y-m_y) );
 }
 
 inline wxInt32 wxPoint2DInt::GetDotProduct( const wxPoint2DInt &vec ) const