diff --git a/bitcoin/tx.c b/bitcoin/tx.c
index 88aca4004..0d0c757cf 100644
--- a/bitcoin/tx.c
+++ b/bitcoin/tx.c
@@ -256,6 +256,7 @@ bool bitcoin_tx_check(const struct bitcoin_tx *tx)
 	if (written != tal_bytelen(newtx))
 		return false;
 
+	tal_free(newtx);
 	return true;
 }