diff --git a/ann/src/main/java/com/twitter/ann/faiss/NativeUtils.java b/ann/src/main/java/com/twitter/ann/faiss/NativeUtils.java
index 1206af1fb..a47456995 100644
--- a/ann/src/main/java/com/twitter/ann/faiss/NativeUtils.java
+++ b/ann/src/main/java/com/twitter/ann/faiss/NativeUtils.java
@@ -6,7 +6,8 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
-import java.util.*;
+import java.util.Locale;
+import java.util.Objects; 
 
 public final class NativeUtils {