diff --git a/dom/plugins/PluginModuleChild.cpp b/dom/plugins/PluginModuleChild.cpp
index 22f0b651c99a..df41ed32ea82 100644
--- a/dom/plugins/PluginModuleChild.cpp
+++ b/dom/plugins/PluginModuleChild.cpp
@@ -1067,7 +1067,7 @@ _createobject(NPP aNPP,
     if (newObject) {
         newObject->_class = aClass;
         newObject->referenceCount = 1;
-        NS_LOG_ADDREF(newObject, 1, "ChildNPObject", sizeof(NPObject));
+        NS_LOG_ADDREF(newObject, 1, "NPObject", sizeof(NPObject));
     }
     return newObject;
 }
@@ -1078,7 +1078,7 @@ _retainobject(NPObject* aNPObj)
     AssertPluginThread();
 
     int32_t refCnt = PR_AtomicIncrement((PRInt32*)&aNPObj->referenceCount);
-    NS_LOG_ADDREF(aNPObj, refCnt, "ChildNPObject", sizeof(NPObject));
+    NS_LOG_ADDREF(aNPObj, refCnt, "NPObject", sizeof(NPObject));
 
     return aNPObj;
 }
@@ -1089,7 +1089,7 @@ _releaseobject(NPObject* aNPObj)
     AssertPluginThread();
 
     int32_t refCnt = PR_AtomicDecrement((PRInt32*)&aNPObj->referenceCount);
-    NS_LOG_RELEASE(aNPObj, refCnt, "ChildNPObject");
+    NS_LOG_RELEASE(aNPObj, refCnt, "NPObject");
 
     if (refCnt == 0) {
         if (aNPObj->_class && aNPObj->_class->deallocate) {
diff --git a/dom/plugins/PluginScriptableObjectChild.cpp b/dom/plugins/PluginScriptableObjectChild.cpp
index 26a273633603..2f7ddb17c6b0 100644
--- a/dom/plugins/PluginScriptableObjectChild.cpp
+++ b/dom/plugins/PluginScriptableObjectChild.cpp
@@ -535,7 +535,7 @@ PluginScriptableObjectChild::CreateProxyObject()
   // own this actor. Set the reference count to 0 here so that when the object
   // dies we will send the destructor message to the child.
   object->referenceCount = 0;
-  NS_LOG_RELEASE(object, 0, "ChildNPObject");
+  NS_LOG_RELEASE(object, 0, "NPObject");
 
   object->parent = const_cast<PluginScriptableObjectChild*>(this);
   return object;
diff --git a/dom/plugins/PluginScriptableObjectChild.h b/dom/plugins/PluginScriptableObjectChild.h
index 5f1f74002f15..b2dd63dabc9c 100644
--- a/dom/plugins/PluginScriptableObjectChild.h
+++ b/dom/plugins/PluginScriptableObjectChild.h
@@ -52,7 +52,15 @@ class PluginScriptableObjectChild;
 struct ChildNPObject : NPObject
 {
   ChildNPObject()
-    : NPObject(), parent(NULL), invalidated(false) { }
+    : NPObject(), parent(NULL), invalidated(false)
+  {
+    MOZ_COUNT_CTOR(ChildNPObject);
+  }
+
+  ~ChildNPObject()
+  {
+    MOZ_COUNT_DTOR(ChildNPObject);
+  }
 
   // |parent| is always valid as long as the actor is alive. Once the actor is
   // destroyed this will be set to null.