diff --git a/Objects/intobject.c b/Objects/intobject.c
index 256824c..31d8130 100644
--- a/Objects/intobject.c
+++ b/Objects/intobject.c
@@ -1050,8 +1050,9 @@
 argument will be truncated towards zero (this does not include a string\n\
 representation of a floating point number!)  When converting a string, use\n\
 the optional base.  It is an error to supply a base when converting a\n\
-non-string. If the argument is outside the integer range a long object\n\
-will be returned instead.");
+non-string.  If base is zero, the proper base is guessed based on the\n\
+string content.  If the argument is outside the integer range a\n\
+long object will be returned instead.");
 
 static PyNumberMethods int_as_number = {
 	(binaryfunc)int_add,	/*nb_add*/