diff --git a/DesktopEditor/graphics/Graphics.cpp b/DesktopEditor/graphics/Graphics.cpp
index 19ba697d17..24ed749aec 100644
--- a/DesktopEditor/graphics/Graphics.cpp
+++ b/DesktopEditor/graphics/Graphics.cpp
@@ -625,7 +625,7 @@ namespace Aggplus
 		}
 
 		double dWidth		 = pPen->Size;
-		double dWidthMinSize = 1.0 / sqrt(m_oCoordTransform.m_internal->m_agg_mtx.determinant());
+		double dWidthMinSize = 1.0 / sqrt(m_oFullTransform.m_internal->m_agg_mtx.determinant());
 
 		if ((0 == dWidth && !m_bIntegerGrid) || dWidth < dWidthMinSize)
 		{
@@ -762,6 +762,7 @@ namespace Aggplus
 			}
 			}
 
+			dWidthMinSize = 1.0 / sqrt(m_oCoordTransform.m_internal->m_agg_mtx.determinant());
 			if ((0 == dWidth && !m_bIntegerGrid) || dWidth < dWidthMinSize)
 				dWidth = dWidthMinSize;