diff --git a/staging/color-management/color-management-v1.xml b/staging/color-management/color-management-v1.xml
index 16a39ca..dda6b94 100644
--- a/staging/color-management/color-management-v1.xml
+++ b/staging/color-management/color-management-v1.xml
@@ -1132,8 +1132,8 @@
     <request name="set_luminances">
       <description summary="primary color volume luminance range and reference white">
         Sets the primary color volume luminance range and the reference white
-        luminance level. These values include the minimum display emission
-        and ambient flare luminances, assumed to be optically additive and have
+        luminance level. These values include the minimum display emission, but
+        not external flare. The minimum display emission is assumed to have
         the chromaticity of the primary color volume white point.
 
         The default luminances from