diff --git a/src/main/java/gov/usgs/earthquake/nshmp/model/FaultRuptureSet.java b/src/main/java/gov/usgs/earthquake/nshmp/model/FaultRuptureSet.java
index 09b4fed78f6647ebceed2e739392b0ebf647c9ef..5cfd7fa79ebd34a6674c30b2a051def12186a6f3 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/model/FaultRuptureSet.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/model/FaultRuptureSet.java
@@ -379,6 +379,8 @@ public class FaultRuptureSet implements RuptureSet {
             : (rBranch.value() <= 1.0)
                 ? rBranch.value() // rate in 1/yr
                 : Maths.roundToDigits(1.0 / rBranch.value(), 4); // rate in yr
+        // TODO above line and rounding should go away, we'll create labels
+        // from 1/rate; all rate-trees will have annual rate, not years
         for (Branch<Mfd.Properties> mBranch : mfdPropsTree) {
           Single props = mBranch.value().getAsSingle();
           String id = String.join(":", props.type().name(), mBranch.id(), rBranch.id());