diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index f875e10..6bffaea 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -8803,7 +8803,8 @@
 PyDoc_STRVAR(format__doc__,
              "S.format(*args, **kwargs) -> str\n\
 \n\
-");
+Return a formatted version of S, using substitutions from args and kwargs.\n\
+The substitutions are identified by braces ('{' and '}').");
 
 static PyObject *
 unicode__format__(PyObject* self, PyObject* args)
@@ -8821,7 +8822,7 @@
 PyDoc_STRVAR(p_format__doc__,
              "S.__format__(format_spec) -> str\n\
 \n\
-");
+Return a formatted version of S as described by format_spec.");
 
 static PyObject *
 unicode__sizeof__(PyUnicodeObject *v)