diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index 9bb7dd3d703ab1..cbbe1840fc3515 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -1047,9 +1047,9 @@ Miscellaneous
 
    .. versionadded:: 3.4
 
-.. function:: set_executable()
+.. function:: set_executable(executable)
 
-   Sets the path of the Python interpreter to use when starting a child process.
+   Set the path of the Python interpreter to use when starting a child process.
    (By default :data:`sys.executable` is used).  Embedders will probably need to
    do some thing like ::