diff --git a/CuraEngineBackend.py b/CuraEngineBackend.py
index 68a2914d6a..1f637568c0 100644
--- a/CuraEngineBackend.py
+++ b/CuraEngineBackend.py
@@ -140,7 +140,7 @@ class CuraEngineBackend(Backend):
             
             verts = numpy.array(mesh_data.getVertices(), copy=True)
             verts[:,[1,2]] = verts[:,[2,1]]
-            verts[:,[2]] *= -1
+            verts[:,1] *= -1
             obj.vertices = verts.tostring()
 
             #if meshData.hasNormals():