diff --git a/python_tools/void_python_tools/voidUtil/plotUtil.py b/python_tools/void_python_tools/voidUtil/plotUtil.py
index 2314470..0624c60 100644
--- a/python_tools/void_python_tools/voidUtil/plotUtil.py
+++ b/python_tools/void_python_tools/voidUtil/plotUtil.py
@@ -58,6 +58,8 @@ def plotNumberFunction(catalogList,
 
   print "Plotting number function"
   
+  catalogList = np.atleast_1d(catalogList)
+
   plt.clf()
   plt.xlabel("$R_{eff}$ [$h^{-1}Mpc$]", fontsize=14)
   
@@ -160,6 +162,8 @@ def plotEllipDist(catalogList,
   
   ellipDistList = [] 
 
+  catalogList = np.atleast_1d(catalogList)
+
   for (iSample,catalog) in enumerate(catalogList):
     sample = catalog.sampleInfo
     data = getArray(catalog.voids, 'ellipticity')