diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index bc60e1dff9ab5..dd41075ddf92e 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -140,7 +140,7 @@
 2   baz  3         2   qux  7
 3   foo  4         3   bar  8
 
->>> merge(A, B, left_on='lkey', right_on='rkey', how='outer')
+>>> A.merge(B, left_on='lkey', right_on='rkey', how='outer')
    lkey  value_x  rkey  value_y
 0  foo   1        foo   5
 1  foo   4        foo   5