diff --git a/object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java b/object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java
index f502b86e2..df6e887b8 100644
--- a/object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java
+++ b/object-pool/src/main/java/com/iluwatar/object/pool/ObjectPool.java
@@ -40,7 +40,7 @@ public abstract class ObjectPool<T> {
    * Checkout object from pool
    */
   public synchronized T checkOut() {
-    if (available.size() <= 0) {
+    if (available.isEmpty()) {
       available.add(create());
     }
     T instance = available.iterator().next();