diff --git a/buildscripts/smoke.py b/buildscripts/smoke.py
index 2568acbe00e..6ae8b32aa97 100755
--- a/buildscripts/smoke.py
+++ b/buildscripts/smoke.py
@@ -145,7 +145,7 @@ class mongod(object):
         utils.ensureDir(dir_name)
         argv = [mongod_executable, "--port", str(self.port), "--dbpath", dir_name]
         if self.kwargs.get('small_oplog'):
-            argv += ["--master", "--oplogSize", "128"]
+            argv += ["--master", "--oplogSize", "256"]
         if self.slave:
             argv += ['--slave', '--source', 'localhost:' + str(srcport)]
         print "running " + " ".join(argv)