diff --git a/src/Mod/Import/App/dxf.cpp b/src/Mod/Import/App/dxf.cpp
index c6a0608811..19e116beac 100644
--- a/src/Mod/Import/App/dxf.cpp
+++ b/src/Mod/Import/App/dxf.cpp
@@ -1772,7 +1772,7 @@ double CDxfRead::mm( double value ) const
 {
     if(m_measurement_inch)
     {
-        value *= 0.0393700787401575;
+        value *= 25.4;
     }
 
     switch(m_eUnits)