diff --git a/src/bcrypt.js b/src/bcrypt.js
index d9c0492..3abed94 100644
--- a/src/bcrypt.js
+++ b/src/bcrypt.js
@@ -75,14 +75,14 @@ bcrypt.genSaltSync = function(rounds, seed_length) {
         rounds = 4;
     else if (rounds > 31)
         rounds = 31;
-    var salt = [];
-    salt.push("$2a$");
+    var salt = '';
+    salt = salt.concat("$2a$");
     if (rounds < 10)
-        salt.push("0");
-    salt.push(rounds.toString());
-    salt.push('$');
-    salt.push(base64_encode(random(BCRYPT_SALT_LEN), BCRYPT_SALT_LEN)); // May throw
-    return salt.join('');
+        salt = salt.concat("0");
+    salt = salt.concat(rounds.toString());
+    salt = salt.concat('$');
+    salt = salt.concat(base64_encode(random(BCRYPT_SALT_LEN), BCRYPT_SALT_LEN)); // May throw
+    return salt;
 };
 
 /**
diff --git a/tests/suite.js b/tests/suite.js
index 8c8afe1..0048b99 100644
--- a/tests/suite.js
+++ b/tests/suite.js
@@ -177,7 +177,7 @@ module.exports = {
 
         "roundsOOB": function(test) {
             var salt1 = bcrypt.genSaltSync(0), // $10$ like not set
-                salt2 = binding.genSaltSync(0);
+                salt2 = binding.genSaltSync(0, 'a');
             test.strictEqual(salt1.substring(0, 7), "$2a$10$");
             test.strictEqual(salt2.substring(0, 7), "$2a$10$");