diff --git a/src/engine/Scrub2.h b/src/engine/Scrub2.h
index 044e3f1d08..f6189566bb 100644
--- a/src/engine/Scrub2.h
+++ b/src/engine/Scrub2.h
@@ -26,9 +26,9 @@
  *
  *
  * Provides a set of functions and utilities for checking and
- * repairing ('scrubbing clean') stock and commodity accounts
- * to use Lots & accounting schedules so that books can be closed.
- *
+ * repairing ('scrubbing clean') the usage of Lots and lot balances
+ * in stock and commodity accounts.  Broken lots are repaired using
+ * a first-in, first-out (FIFO) accounting schedule.
  */
 
 #ifndef XACC_SCRUB2_H