diff --git a/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py b/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py
index 9999468..53d079b 100644
--- a/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py
+++ b/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py
@@ -21,6 +21,7 @@ import numpy as np
 import healpy as healpy
 import scipy.integrate
 import void_python_tools as ct
+import os
 
 __all__=['getSurveyProps']