diff --git a/CuraEngineBackend.py b/CuraEngineBackend.py
index dfa106a9c3..aed68e2c3b 100644
--- a/CuraEngineBackend.py
+++ b/CuraEngineBackend.py
@@ -141,7 +141,7 @@ 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():
diff --git a/ProcessSlicedObjectListJob.py b/ProcessSlicedObjectListJob.py
index 5f9192a776..6cd823ba2d 100644
--- a/ProcessSlicedObjectListJob.py
+++ b/ProcessSlicedObjectListJob.py
@@ -45,6 +45,8 @@ class ProcessSlicedObjectListJob(Job):
                     points /= 1000
                     points = numpy.insert(points, 1, layer.id * layerHeight, axis = 1)
 
+                    points[:,2] *= -1
+
                     #points = numpy.pad(points, ((0,0), (0,1)), 'constant', constant_values=(0.0, 1.0))
                     #inverse = node.getWorldTransformation().getInverse().getData()
                     #points = points.dot(inverse)