diff --git a/guide/README.md b/guide/README.md
index 205537065..2e8f1d68c 100644
--- a/guide/README.md
+++ b/guide/README.md
@@ -116,7 +116,7 @@ int main(int argc, char *argv[]) {
     // at this point, the model object should allow us to recover the program state
     ...
     // each iteration can contain multiple calls of allreduce/broadcast
-    rabit::Allreduce(&data[0], n);
+    rabit::Allreduce<rabit::op::Max>(&data[0], n);
     ...
     // checkpoint model after one iteration finishes
     rabit::CheckPoint(&model);
diff --git a/guide/basic.py b/guide/basic.py
index d6817855c..800d1cb80 100755
--- a/guide/basic.py
+++ b/guide/basic.py
@@ -21,4 +21,3 @@ print '@node[%d] before-allreduce: a=%s' % (rank, str(a))
 a = rabit.allreduce(a, rabit.MAX)
 print '@node[%d] after-allreduce: a=%s' % (rank, str(a))
 rabit.finalize()
-
diff --git a/guide/broadcast.py b/guide/broadcast.py
index b657efd90..defe69eaa 100755
--- a/guide/broadcast.py
+++ b/guide/broadcast.py
@@ -20,4 +20,3 @@ s = rabit.broadcast(s, 0)
 
 print '@node[%d] after-broadcast: s=\"%s\"' % (rank, str(s))
 rabit.finalize()
-