diff --git a/src/DecryptionFailureTracker.js b/src/DecryptionFailureTracker.js
index 58ba1ae8dc..e7809d2f6c 100644
--- a/src/DecryptionFailureTracker.js
+++ b/src/DecryptionFailureTracker.js
@@ -157,12 +157,15 @@ export default class DecryptionFailureTracker {
     }
 
     /**
-     * If there is a failure that should be tracked, call the given trackDecryptionFailure
-     * function with the first failure in the FIFO of failures that should be tracked.
+     * If there are failures that should be tracked, call the given trackDecryptionFailure
+     * function with the number of failures that should be tracked.
      */
     trackFailure() {
         if (this.failuresToTrack.length > 0) {
-            // Remove all failures, and expose the number of failures
+            // Remove all failures, and expose the number of failures for now.
+            //
+            // TODO: Track a histogram of error types to cardinailty to allow for
+            // aggregation by error type.
             this.trackDecryptionFailure(this.failuresToTrack.splice(0).length);
         }
     }