1 files changed, 3 insertions, 3 deletions
diff --git a/lib/smalloc.js b/lib/smalloc.js
index b0226a0313..b6e9093472 100644
--- a/lib/smalloc.js
+++ b/lib/smalloc.js
@@ -39,15 +39,15 @@ function alloc(n, obj) {
 
   if (n > kMaxLength)
     throw new RangeError('n > kMaxLength');
-  if (Array.isArray(obj))
+  if (IS_ARRAY(obj))
     throw new TypeError('Arrays are not supported');
 
-  return smalloc.alloc(obj === undefined ? {} : obj, n);
+  return smalloc.alloc(IS_UNDEFINED(obj) ? {} : obj, n);
 }
 
 
 function dispose(obj) {
-  if (obj instanceof Buffer)
+  if (IS_BUFFER(obj))
     throw new TypeError('obj cannot be a Buffer');
   smalloc.dispose(obj);
 }