diff --git a/Lib/os.py b/Lib/os.py
index 2c7d954..2403f30 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -116,6 +116,7 @@
 
 # Python uses fixed values for the SEEK_ constants; they are mapped
 # to native constants if necessary in posixmodule.c
+# Other possible SEEK values are directly imported from posixmodule.c
 SEEK_SET = 0
 SEEK_CUR = 1
 SEEK_END = 2