diff --git a/bitcoin/tx.c b/bitcoin/tx.c
index c01b41a4f..0aa6d1d90 100644
--- a/bitcoin/tx.c
+++ b/bitcoin/tx.c
@@ -63,7 +63,7 @@ int bitcoin_tx_add_multi_outputs(struct bitcoin_tx *tx,
 	return tx->wtx->num_outputs;
 }
 
-static bool elements_tx_output_is_fee(const struct bitcoin_tx *tx, int outnum)
+bool elements_tx_output_is_fee(const struct bitcoin_tx *tx, int outnum)
 {
 	assert(outnum < tx->wtx->num_outputs);
 	return chainparams->is_elements &&
diff --git a/bitcoin/tx.h b/bitcoin/tx.h
index 64470eb9d..59e2395ab 100644
--- a/bitcoin/tx.h
+++ b/bitcoin/tx.h
@@ -172,4 +172,9 @@ bool bitcoin_tx_check(const struct bitcoin_tx *tx);
  */
 void bitcoin_tx_finalize(struct bitcoin_tx *tx);
 
+/**
+ * Returns true if the given outnum is a fee output
+ */
+bool elements_tx_output_is_fee(const struct bitcoin_tx *tx, int outnum);
+
 #endif /* LIGHTNING_BITCOIN_TX_H */