diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 11147525d7e..313dbffdcde 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -426,7 +426,7 @@ are always available.  They are listed here in alphabetical order.
               n += 1
 
 
-.. function:: eval(expression, globals=None, locals=None)
+.. function:: eval(expression[, globals[, locals]])
 
    The arguments are a string and optional globals and locals.  If provided,
    *globals* must be a dictionary.  If provided, *locals* can be any mapping