diff --git a/groupConnectivity.pyx b/groupConnectivity.pyx
index 7e30885d219e57fd1b47b76ebe2d1095dc275bfd..394c43ed19d8a5a26095894ed0ef17363fbbcec1 100644
--- a/groupConnectivity.pyx
+++ b/groupConnectivity.pyx
@@ -91,12 +91,12 @@ def subdivisionIterator(G, edges = None):
 
 def generateSubdivisions(file, G, edges = None,
                          function = lambda H: H.graph6_string(),
-                         parallel = 1):
+                         parallel = 0):
   f = open(file, 'w+')
   f.write("# Subdivisions of edges '%s' of graph '%s' (%s)\n" %
           (edges, G.graph6_string(), G))
 
-  if parallel == 1:
+  if parallel == 0:
     iterator = map(function, subdivisionIterator(G, edges))
   else:
     iterator = parmap(function, subdivisionIterator(G, edges), parallel)