1 files changed, 2 insertions, 2 deletions
diff --git a/process.c b/process.c
index 9541c600d3..8a83aed98a 100644
--- a/process.c
+++ b/process.c
@@ -1539,13 +1539,13 @@ rb_f_system(argc, argv)
 
 /*
  *  call-seq:
- *     sleep(duration=0)    => fixnum
+ *     sleep([duration])    => fixnum
  *  
  *  Suspends the current thread for _duration_ seconds (which may be
  *  any number, including a +Float+ with fractional seconds). Returns the actual
  *  number of seconds slept (rounded), which may be less than that asked
  *  for if the thread was interrupted by a +SIGALRM+, or if
- *  another thread calls <code>Thread#run</code>. An argument of zero
+ *  another thread calls <code>Thread#run</code>. Zero arguments
  *  causes +sleep+ to sleep forever.
  *     
  *     Time.new    #=> Wed Apr 09 08:56:32 CDT 2003