diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 09d72966899afde5c452e8b35d6e7753e14fd243..83cd1636b9bea84b8efeff6b85d9292c2d13060d 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -621,7 +621,8 @@ struct drm_color_ctm {
 
 struct drm_color_lut {
 	/*
-	 * Data is U0.16 fixed point format.
+	 * Values are mapped linearly to 0.0 - 1.0 range, with 0x0 == 0.0 and
+	 * 0xffff == 1.0.
 	 */
 	__u16 red;
 	__u16 green;