diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 283102a..1a50ce3 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -2465,10 +2465,10 @@
 }
 
 PyDoc_STRVAR(decode_doc,
-"B.decode([encoding[, errors]]) -> str\n\
+"B.decode([encoding='utf-8'[, errors='strict']]) -> str\n\
 \n\
-Decode B using the codec registered for encoding. encoding defaults\n\
-to the default encoding. errors may be given to set a different error\n\
+Decode B using the codec registered for encoding. Default encoding\n\
+is 'utf-8'. errors may be given to set a different error\n\
 handling scheme.  Default is 'strict' meaning that encoding errors raise\n\
 a UnicodeDecodeError.  Other possible values are 'ignore' and 'replace'\n\
 as well as any other name registered with codecs.register_error that is\n\
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 382e911..b8fa8ee 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -2289,10 +2289,10 @@
 
 
 PyDoc_STRVAR(decode__doc__,
-"B.decode([encoding[, errors]]) -> str\n\
+"B.decode([encoding='utf-8'[, errors='strict']]) -> str\n\
 \n\
-Decode B using the codec registered for encoding. encoding defaults\n\
-to the default encoding. errors may be given to set a different error\n\
+Decode B using the codec registered for encoding. Default encoding\n\
+is 'utf-8'. errors may be given to set a different error\n\
 handling scheme.  Default is 'strict' meaning that encoding errors raise\n\
 a UnicodeDecodeError.  Other possible values are 'ignore' and 'replace'\n\
 as well as any other name registerd with codecs.register_error that is\n\
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 32bcb34..4be0b17 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -7393,10 +7393,10 @@
 }
 
 PyDoc_STRVAR(encode__doc__,
-             "S.encode([encoding[, errors]]) -> bytes\n\
+             "S.encode([encoding='utf-8'[, errors='strict']]) -> bytes\n\
 \n\
-Encode S using the codec registered for encoding. encoding defaults\n\
-to the default encoding. errors may be given to set a different error\n\
+Encode S using the codec registered for encoding. Default encoding\n\
+is 'utf-8'. errors may be given to set a different error\n\
 handling scheme. Default is 'strict' meaning that encoding errors raise\n\
 a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and\n\
 'xmlcharrefreplace' as well as any other name registered with\n\