diff --git a/python_tools/void_python_tools/backend/launchers.py b/python_tools/void_python_tools/backend/launchers.py
index dab68b9..810c423 100644
--- a/python_tools/void_python_tools/backend/launchers.py
+++ b/python_tools/void_python_tools/backend/launchers.py
@@ -35,6 +35,7 @@ import sys
 from   pylab import figure
 from   netCDF4 import Dataset
 from void_python_tools.backend.classes import *
+import pickle
 import void_python_tools.apTools as vp
 
 NetCDFFile = Dataset