diff --git a/test/lib/sun/hotspot/WhiteBox.java b/test/lib/sun/hotspot/WhiteBox.java
index 2cd3d670295..1df21011ee8 100644
--- a/test/lib/sun/hotspot/WhiteBox.java
+++ b/test/lib/sun/hotspot/WhiteBox.java
@@ -363,4 +363,7 @@ public class WhiteBox {
 
   // Safepoint Checking
   public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue);
+
+  // Sharing
+  public native boolean isShared(Object o);
 }