diff --git a/fluents/plots.py b/fluents/plots.py
index 29914b6..98aa745 100644
--- a/fluents/plots.py
+++ b/fluents/plots.py
@@ -1,4 +1,4 @@
-import os,sys
+import os,sys,copy
 from itertools import izip
 import pygtk
 import gobject
@@ -1074,9 +1074,9 @@ class VennPlot(Plot):
         a = .5
         r = 1.5
         mr = .2
-        self.c1 = c1 =  Circle((-1,0), radius=r, alpha=a, facecolor='b', resolution=res)
-        self.c2 = c2 = Circle((1,0), radius=r, alpha=a, facecolor='r', resolution=res)
-        self.c3 = c3 = Circle((0, scipy.sqrt(3)), radius=r, alpha=a, facecolor='g', resolution=res)
+        self.c1 = c1 =  Circle((-1,0), radius=r, alpha=a, facecolor='b')
+        self.c2 = c2 = Circle((1,0), radius=r, alpha=a, facecolor='r')
+        self.c3 = c3 = Circle((0, scipy.sqrt(3)), radius=r, alpha=a, facecolor='g')
 
         self.c1marker = Circle((-1.25, -.25), radius=mr, facecolor='y', alpha=0)
         self.c2marker = Circle((1.25, -.25), radius=mr, facecolor='y', alpha=0)