diff --git a/types/address/hash.go b/types/address/hash.go
index 912b831fc2da..8d9c5b39e11b 100644
--- a/types/address/hash.go
+++ b/types/address/hash.go
@@ -20,12 +20,13 @@ type Addressable interface {
 // Hash creates a new address from address type and key
 func Hash(typ string, key []byte) []byte {
 	hasher := sha256.New()
-	hasher.Write(conv.UnsafeStrToBytes(typ))
+	_, err := hasher.Write(conv.UnsafeStrToBytes(typ))
+	// the error always nil, it's here only to satisfy the io.Writer interface
+	errors.AssertNil(err)
 	th := hasher.Sum(nil)
 
 	hasher.Reset()
-	_, err := hasher.Write(th)
-	// the error always nil, it's here only to satisfy the io.Writer interface
+	_, err = hasher.Write(th)
 	errors.AssertNil(err)
 	_, err = hasher.Write(key)
 	errors.AssertNil(err)