diff --git a/src/ipa/ipu3/algorithms/awb.cpp b/src/ipa/ipu3/algorithms/awb.cpp
index 7e10460f..101d84ca 100644
--- a/src/ipa/ipu3/algorithms/awb.cpp
+++ b/src/ipa/ipu3/algorithms/awb.cpp
@@ -46,9 +46,9 @@ static constexpr uint32_t kMinCellsPerZoneRatio = 255 * 90 / 100;
  * \struct Accumulator
  * \brief RGB statistics for a given zone
  *
- * The Accumulator structure stores the sum of the average of each cell in a
- * zone of the image, as well as the number of cells which were unsaturated and
- * therefore included in the average.
+ * Accumulate red, green and blue values for each non-saturated items over a
+ * zone. Items can for instance be pixels, but also the average of groups of
+ * pixels, depending on who uses the accumulator.
  * \todo move this description and structure into a common header
  *
  * Cells which are saturated beyond the threshold defined in