diff --git a/electrum/submarine_swaps.py b/electrum/submarine_swaps.py
index 69a9f7c82..ea62c3e18 100644
--- a/electrum/submarine_swaps.py
+++ b/electrum/submarine_swaps.py
@@ -168,6 +168,7 @@ def create_claim_tx(
     """Create tx to either claim successful reverse-swap,
     or to get refunded for timed-out forward-swap.
     """
+    txin.nsequence = 0xffffffff - 2
     txin.script_sig = b''
     txin.witness_script = witness_script
     txout = PartialTxOutput.from_address_and_value(address, amount_sat)