diff --git a/Doc/library/curses.rst b/Doc/library/curses.rst
index 0b8b7c9..f31b9c5 100644
--- a/Doc/library/curses.rst
+++ b/Doc/library/curses.rst
@@ -1091,7 +1091,7 @@
    rendition (as set by :meth:`bkgdset`) merged into them.
 
 
-.. method:: window.scroll(lines=1)
+.. method:: window.scroll([lines=1])
 
    Scroll the screen or scrolling region upward by *lines* lines.
 
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 8b2e582..3f43338 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1145,7 +1145,7 @@
    Availability: Unix.
 
 
-.. function:: mknod(filename, mode=0o600, device=0)
+.. function:: mknod(filename[, mode=0o600[, device=0]])
 
    Create a filesystem node (file, device special file or named pipe) named
    *filename*. *mode* specifies both the permissions to use and the type of node
diff --git a/Doc/library/ossaudiodev.rst b/Doc/library/ossaudiodev.rst
index fbbda26..cf302cc 100644
--- a/Doc/library/ossaudiodev.rst
+++ b/Doc/library/ossaudiodev.rst
@@ -277,7 +277,7 @@
 simple calculations.
 
 
-.. method:: oss_audio_device.setparameters(format, nchannels, samplerate, strict=False)
+.. method:: oss_audio_device.setparameters(format, nchannels, samplerate[, strict=False])
 
    Set the key audio sampling parameters---sample format, number of channels, and
    sampling rate---in one method call.  *format*,  *nchannels*, and *samplerate*
diff --git a/Doc/library/select.rst b/Doc/library/select.rst
index 6f8df6e..a450ec2 100644
--- a/Doc/library/select.rst
+++ b/Doc/library/select.rst
@@ -285,7 +285,7 @@
    Create a kqueue object from a given file descriptor.
 
 
-.. method:: kqueue.control(changelist, max_events, timeout=None) -> eventlist
+.. method:: kqueue.control(changelist, max_events[, timeout=None]) -> eventlist
 
    Low level interface to kevent