diff --git a/src/instrument.js b/src/instrument.js
index f110acd0..4c5f719f 100644
--- a/src/instrument.js
+++ b/src/instrument.js
@@ -236,7 +236,7 @@ function liftReducerWith(reducer, initialCommittedState, monitorReducer, options
       }
       case ActionTypes.PERFORM_ACTION: {
         if (options.maxAge && stagedActionIds.length === options.maxAge) {
-          // If maxAge has been reached, remove oldest action.
+          // If maxAge has been reached, auto-commit earliest non-@@INIT action.
           delete actionsById[stagedActionIds[1]];
           skippedActionIds = skippedActionIds.filter(id => id !== stagedActionIds[1]);
           stagedActionIds = [0].concat(stagedActionIds.slice(2));