diff --git a/eeschema/lib_shape.cpp b/eeschema/lib_shape.cpp
index 3ebb37de78..0f4a19c912 100644
--- a/eeschema/lib_shape.cpp
+++ b/eeschema/lib_shape.cpp
@@ -256,7 +256,12 @@ void LIB_SHAPE::print( const RENDER_SETTINGS* aSettings, const wxPoint& aOffset,
 
         CalcArcAngles( t1, t2 );
 
-        if( aTransform.MapAngles( &t1, &t2 ) == ( NormalizeAngle180( t1 - t2 ) > 0 ) )
+        // N.B. The order of evaluation is critical here as MapAngles will modify t1, t2
+        // and the Normalize routine depends on these modifications for the correct output
+        bool transformed = aTransform.MapAngles( &t1, &t2 );
+        bool transformed2 = ( ( t1 - t2 ).Normalize180() > 0 );
+
+        if( transformed  == transformed2 )
             std::swap( pt1, pt2 );
     }