diff --git a/item_updater.hpp b/item_updater.hpp
index f09891c..7b37e4d 100755
--- a/item_updater.hpp
+++ b/item_updater.hpp
@@ -141,8 +141,12 @@
          */
         void deleteAll();
 
-        /** @brief Deletes the active PNOR version with highest priority
-                   if the total number of volumes exceeds the threshold.
+        /** @brief Brings the total number of active PNOR versions to
+         *         ACTIVE_PNOR_MAX_ALLOWED -1. This function is intended to be
+         *         run before activating a new PNOR version. If this function
+         *         needs to delete any PNOR version(s) it will delete the
+         *         version(s) with the highest priority, skipping the
+         *         functional PNOR version.
          */
         void freeSpace();