diff --git a/slot_change_finder.py b/slot_change_finder.py
index f7ba47b..9e0c283 100644
--- a/slot_change_finder.py
+++ b/slot_change_finder.py
@@ -110,11 +110,10 @@ def main():
     chain_id = w3.eth.chain_id
     tip = w3.eth.block_number
     print(f"🌐 Connected (chainId {chain_id}, tip {tip})")
-    if hi > tip: print(f"⚠️ end_block {hi} > tip {tip}; clamping."); hi = tip
-
     if hi > tip:
-        print(f"⚠️ Upper bound {hi} exceeds tip {tip}; clamping to tip.")
+        print(f"⚠️ end_block {hi} > tip {tip}; clamping to tip {tip}.", file=sys.stderr)
         hi = tip
+
     if lo < 0:
         print("❌ start_block must be ≥ 0."); sys.exit(2)