diff --git a/GCodeWriter.py b/GCodeWriter.py
index 0ca0b507e1..bcbafd2089 100644
--- a/GCodeWriter.py
+++ b/GCodeWriter.py
@@ -1,5 +1,6 @@
 from UM.Mesh.MeshWriter import MeshWriter
 from UM.Logger import Logger
+import io
 
 class GCodeWriter(MeshWriter):
     def __init__(self):