diff --git a/plugins/GCodeReader/GCodeReader.py b/plugins/GCodeReader/GCodeReader.py
index 3243a1623e..e8c2a4e0fd 100755
--- a/plugins/GCodeReader/GCodeReader.py
+++ b/plugins/GCodeReader/GCodeReader.py
@@ -138,11 +138,11 @@ class GCodeReader(MeshReader):
         if self._is_absolute_positioning:
             x = params.x if params.x is not None else x
             y = params.y if params.y is not None else y
-            z = params.z if params.z is not None else position.z
+            z = params.z if params.z is not None else z
         else:
-            x += params.x if params.x is not None else x
-            y += params.y if params.y is not None else y
-            z += params.z if params.z is not None else position.z
+            x += params.x if params.x is not None else 0
+            y += params.y if params.y is not None else 0
+            z += params.z if params.z is not None else 0
 
         if params.e is not None:
             new_extrusion_value = params.e if self._is_absolute_positioning else e[self._extruder_number] + params.e