diff --git a/CHANGELOG b/CHANGELOG
index fa2cb804835cf25f8a1a55a1270e774109077276..a426610049795b721abb1f4419642593292d5b39 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -4,8 +4,9 @@ BornAgain-22.0, in preparation
     * LambdaScan for time-of-flight offspec
     * Datafield::flat flattens out axis of size 1
    > API:
-    * Detector2D replaces RectangularDetector and SphericalDetector. Nominal axes are equidistant,
-      but scattering is computed for the actual phi, alpha of each pixel.
+    * Detector2D replaces RectangularDetector and SphericalDetector. Parameterized through
+      span and position of center. Nominal axes are equidistant, but scattering is computed
+      for the actual phi, alpha of each pixel.
     * Offspec analyzer is set for detector, not scan(#651)
     * FitObjective::addSimulationAndData has been replaced by function addFitPair,
       which takes experimental data in form of a Datafield object instead of a NumPy array