diff --git a/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicJavaFileManager.java b/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicJavaFileManager.java
index 62d5d95e4..3642b1055 100644
--- a/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicJavaFileManager.java
+++ b/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicJavaFileManager.java
@@ -113,8 +113,9 @@ public class DynamicJavaFileManager extends ForwardingJavaFileManager<JavaFileMa
 
         @Override
         public T next() {
-            if (first.hasNext())
+            if (first.hasNext()) {
                 return first.next();
+            }
             return next.next();
         }