diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index cd8aa6b..c5128d8 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -817,8 +817,8 @@
     def communicate(self, input=None, timeout=None):
         """Interact with process: Send data to stdin.  Read data from
         stdout and stderr, until end-of-file is reached.  Wait for
-        process to terminate.  The optional input argument should be a
-        string to be sent to the child process, or None, if no data
+        process to terminate.  The optional input argument should be
+        bytes to be sent to the child process, or None, if no data
         should be sent to the child.
 
         communicate() returns a tuple (stdout, stderr)."""