diff --git a/common/amount.c b/common/amount.c
index bfe29e7a8..fa1870700 100644
--- a/common/amount.c
+++ b/common/amount.c
@@ -360,6 +360,11 @@ bool amount_sat_zero(struct amount_sat a)
 	return a.satoshis == 0;
 }
 
+bool amount_msat_zero(struct amount_msat a)
+{
+	return a.millisatoshis == 0;
+}
+
 bool amount_msat_eq(struct amount_msat a, struct amount_msat b)
 {
 	return a.millisatoshis == b.millisatoshis;
diff --git a/common/amount.h b/common/amount.h
index 616318740..b7277d7ee 100644
--- a/common/amount.h
+++ b/common/amount.h
@@ -94,6 +94,7 @@ bool amount_msat_eq(struct amount_msat a, struct amount_msat b);
 
 /* Is a zero? */
 bool amount_sat_zero(struct amount_sat a);
+bool amount_msat_zero(struct amount_msat a);
 
 /* Is a > b? */
 bool amount_sat_greater(struct amount_sat a, struct amount_sat b);