diff --git a/Lib/colorsys.py b/Lib/colorsys.py
index 8a096dc..4a62f9d 100644
--- a/Lib/colorsys.py
+++ b/Lib/colorsys.py
@@ -11,8 +11,8 @@
 Supported color systems:
 RGB: Red, Green, Blue components
 YIQ: used by composite video signals
-HLS: Hue, Luminance, S???
-HSV: Hue, Saturation, Value(?)
+HLS: Hue, Luminance, Saturation
+HSV: Hue, Saturation, Value
 """
 # References:
 # XXX Where's the literature?