diff --git a/.env.sample.hekla b/.env.sample.hekla
index 8b3a483..76e399d 100644
--- a/.env.sample.hekla
+++ b/.env.sample.hekla
@@ -77,7 +77,8 @@ PROVER_SET=
 TXPOOL_LOCALS=
 # If set to true, the proposer will use calldata as DA when the blob fee is more expensive than using calldata.
 FALLBACK_TO_CALLDATA=
-# Enable revert protection. When you are not the first taiko proposer in current L1 block, you would revert.
+# If set to true, enable revert protection. When you are not the first taiko proposer in current L1 block, you would revert.
+# This function must be supported by your PBS provider to be effective.
 REVERT_PROTECTION=
 
 # Transaction Manager Flags (Leave blank if using default values.) These only affect Prover and Proposer.