diff --git a/Framework/HistogramData/inc/MantidHistogramData/LinearGenerator.h b/Framework/HistogramData/inc/MantidHistogramData/LinearGenerator.h
index e965f7c1fa5de98517759f11f29c929bc1b0248d..38195d8e003a601f0d0199b32dacdb3c9a189312 100644
--- a/Framework/HistogramData/inc/MantidHistogramData/LinearGenerator.h
+++ b/Framework/HistogramData/inc/MantidHistogramData/LinearGenerator.h
@@ -6,7 +6,8 @@
 namespace Mantid {
 namespace HistogramData {
 
-/** LinearGenerator : TODO: DESCRIPTION
+/** LinearGenerator : A helper functor to generate linearly increasing
+  series of double values.
 
   Copyright © 2016 ISIS Rutherford Appleton Laboratory, NScD Oak Ridge
   National Laboratory & European Spallation Source