diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 6e8f369..f66290f 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -41,7 +41,7 @@
     mode is an optional string that specifies the mode in which the file is
     opened. It defaults to 'r' which means open for reading in text mode. Other
     common values are 'w' for writing (truncating the file if it already
-    exists), 'x' for creating and writing to a new file, and 'a' for appending
+    exists), 'x' for exclusive creation of a new file, and 'a' for appending
     (which on some Unix systems, means that all writes append to the end of the
     file regardless of the current seek position). In text mode, if encoding is
     not specified the encoding used is platform dependent. (For reading and