diff --git a/frontend/server/src/main/java/org/pytorch/serve/device/utils/AppleUtil.java b/frontend/server/src/main/java/org/pytorch/serve/device/utils/AppleUtil.java
index 921763adca..ef3bc2485d 100644
--- a/frontend/server/src/main/java/org/pytorch/serve/device/utils/AppleUtil.java
+++ b/frontend/server/src/main/java/org/pytorch/serve/device/utils/AppleUtil.java
@@ -7,6 +7,8 @@
 import java.util.ArrayList;
 import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
 import org.pytorch.serve.device.Accelerator;
 import org.pytorch.serve.device.AcceleratorVendor;
 import org.pytorch.serve.device.interfaces.IAcceleratorUtility;