diff --git a/PC/_winreg.c b/PC/_winreg.c
index cbf30fc7aed..de66f6a34cf 100644
--- a/PC/_winreg.c
+++ b/PC/_winreg.c
@@ -258,7 +258,7 @@ PyDoc_STRVAR(SetValueEx_doc,
 "SetValueEx(key, value_name, reserved, type, value) - Stores data in the value field of an open registry key.\n"
 "\n"
 "key is an already open key, or any one of the predefined HKEY_* constants.\n"
-"sub_key is a string that names the subkey with which the value is associated.\n"
+"value_name is a string containing the name of the value to set, or None\n"
 "type is an integer that specifies the type of the data.  This should be one of:\n"
 "  REG_BINARY -- Binary data in any form.\n"
 "  REG_DWORD -- A 32-bit number.\n"