diff --git a/contracts/pool/PoolService.sol b/contracts/pool/PoolService.sol
index 0c7c50c48..bb453bc78 100644
--- a/contracts/pool/PoolService.sol
+++ b/contracts/pool/PoolService.sol
@@ -263,6 +263,7 @@ contract PoolService is
         // call bundle service for bookkeeping and additional checks
         _bundleService.unstake(instance, bundleNftId, amount);
 
+        // FIXME: performance fee is only calculated on the earnings
         (
             Amount performanceFeeAmount,
             Amount netAmount