diff --git a/modules/coin/coin.go b/modules/coin/coin.go
index 168b069259..b4b8fc9775 100644
--- a/modules/coin/coin.go
+++ b/modules/coin/coin.go
@@ -127,6 +127,11 @@ func (coins Coins) IsValid() bool {
 	}
 }
 
+// IsValidNonnegative tests is coins IsValid and IsNonnegative
+func (coins Coins) IsValidNonnegative() bool {
+	return coins.IsValid() && coins.IsNonnegative()
+}
+
 // Plus combines to sets of coins
 //
 // TODO: handle empty coins!