diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 0c1f29d8b69..cc67a378d59 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -4626,7 +4626,7 @@ can be used interchangeably to index the same dictionary entry.
 
       :meth:`update` accepts either another object with a ``keys()`` method (in
       which case :meth:`~object.__getitem__` is called with every key returned from
-      the method). or an iterable of key/value pairs (as tuples or other iterables
+      the method) or an iterable of key/value pairs (as tuples or other iterables
       of length two). If keyword arguments are specified, the dictionary is then
       updated with those key/value pairs: ``d.update(red=1, blue=2)``.
 
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 0712bedc838..4e965314945 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -3634,8 +3634,8 @@ PyDoc_STRVAR(sizeof__doc__,
 "D.__sizeof__() -> size of D in memory, in bytes");
 
 PyDoc_STRVAR(update__doc__,
-"D.update([E, ]**F) -> None.  Update D from dict/iterable E and F.\n\
-If E is present and has a .keys() method, then does:  for k in E: D[k] = E[k]\n\
+"D.update([E, ]**F) -> None.  Update D from mapping/iterable E and F.\n\
+If E is present and has a .keys() method, then does:  for k in E.keys(): D[k] = E[k]\n\
 If E is present and lacks a .keys() method, then does:  for k, v in E: D[k] = v\n\
 In either case, this is followed by: for k in F:  D[k] = F[k]");