diff --git a/openjdkjvm/OpenjdkJvm.cc b/openjdkjvm/OpenjdkJvm.cc
index be1ab78..765225a 100644
--- a/openjdkjvm/OpenjdkJvm.cc
+++ b/openjdkjvm/OpenjdkJvm.cc
@@ -401,7 +401,7 @@
     art::ThrowNullPointerException("object == null");
     return JNI_FALSE;
   }
-  return soa.Self()->HoldsLock(object.Ptr());
+  return soa.Self()->HoldsLock(object);
 }
 
 JNIEXPORT void JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring java_name) {