balloon.go | 7 ++++---

diff --git a/balloon.go b/balloon.go
index b8020d427f4a558bc07372279dc0fabf9b4f253e3770e67cd062833b5dcea6f7..59c5d751b38a236453e69aec8eb463c938c7221be18b82e1198306a9e27ec5af 100644
--- a/balloon.go
+++ b/balloon.go
@@ -141,9 +141,10 @@ 	var i int
 	results := make(chan []byte)
 	for ; i < jobs; i++ {
 		go func(i int) {
-			saltBuf := make([]byte, 8)
-			binary.BigEndian.PutUint64(saltBuf, uint64(i))
-			results <- B(hasher(), passwd, append(salt, saltBuf...), sCost, tCost)
+			saltBuf := make([]byte, len(salt)+8)
+			copy(saltBuf, salt)
+			binary.BigEndian.PutUint64(saltBuf[len(salt):], uint64(i))
+			results <- B(hasher(), passwd, saltBuf, uint64(sCost), uint64(tCost))
 		}(i)
 	}
 	h := hasher()