diff --git a/README.rst b/README.rst
index dfa5b237..07996e70 100644
--- a/README.rst
+++ b/README.rst
@@ -241,7 +241,7 @@ Stream I/O
   >>> # process video 100 frames at a time and save output as a new video 
   >>> # with the same frame rate
   >>> with ffmpegio.open('myvideo.mp4', 'rv', blocksize=100) as fin,
-  >>>      ffmpegio.open('myoutput.mp4', 'wv', rate=fin.rate) as fout:
+  >>>      ffmpegio.open('myoutput.mp4', 'wv', rate_in=fin.rate) as fout:
   >>>     for frames in fin:
   >>>         fout.write(myprocess(frames))
 
diff --git a/docsrc/index.rst b/docsrc/index.rst
index 401c30f3..12ffae72 100644
--- a/docsrc/index.rst
+++ b/docsrc/index.rst
@@ -241,7 +241,7 @@ Stream I/O
   >>> # process video 100 frames at a time and save output as a new video 
   >>> # with the same frame rate
   >>> with ffmpegio.open('myvideo.mp4', 'rv', blocksize=100) as fin,
-  >>>      ffmpegio.open('myoutput.mp4', 'wv', rate=fin.rate) as fout:
+  >>>      ffmpegio.open('myoutput.mp4', 'wv', rate_in=fin.rate) as fout:
   >>>     for frames in fin:
   >>>         fout.write(myprocess(frames))