diff --git a/src/jnienv.cpp b/src/jnienv.cpp
index 9133fc89b9..36a27e6dfc 100644
--- a/src/jnienv.cpp
+++ b/src/jnienv.cpp
@@ -180,6 +180,8 @@ ThrowNew(Thread* t, jclass c, const char* message)
 void JNICALL
 DeleteLocalRef(Thread* t, jobject r)
 {
+  ENTER(t, Thread::ActiveState);
+
   disposeLocalReference(t, r);
 }
 
@@ -290,7 +292,7 @@ NewObject(Thread* t, jclass c, jmethodID m, ...)
   va_list a;
   va_start(a, m);
 
-  jobject r = NewObject(t, c, m, a);
+  jobject r = NewObjectV(t, c, m, a);
 
   va_end(a);
 
diff --git a/src/machine.cpp b/src/machine.cpp
index 510745ffdd..c094602a9c 100644
--- a/src/machine.cpp
+++ b/src/machine.cpp
@@ -2715,6 +2715,17 @@ objectMonitor(Thread* t, object o, bool createNew)
 
     ENTER(t, Thread::ExclusiveState);
 
+    p = hashMapFind(t, t->m->monitorMap, o, objectHash, objectEqual);
+    if (p) {
+      if (DebugMonitors) {
+        fprintf(stderr, "found monitor %p for object %x\n",
+                static_cast<System::Monitor*>(pointerValue(t, p)),
+                objectHash(t, o));
+      }
+
+      return static_cast<System::Monitor*>(pointerValue(t, p));
+    }
+
     System::Monitor* m;
     System::Status s = t->m->system->make(&m);
     expect(t, t->m->system->success(s));