diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 0a5bfd2a5e..1aecce56f4 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -519,12 +519,12 @@ namespace OpenSim.Region.Framework.Scenes
 
         protected internal void AddPhysicalPrim(int number)
         {
-            m_physicalPrim++;
+            m_physicalPrim += number;
         }
 
         protected internal void RemovePhysicalPrim(int number)
         {
-            m_physicalPrim--;
+            m_physicalPrim -= number;
         }
 
         protected internal void AddToScriptLPS(int number)
diff --git a/OpenSim/Region/Framework/Scenes/Tests/SceneStatisticsTests.cs b/OpenSim/Region/Framework/Scenes/Tests/SceneStatisticsTests.cs
new file mode 100644
index 0000000000..16670029c0
--- /dev/null
+++ b/OpenSim/Region/Framework/Scenes/Tests/SceneStatisticsTests.cs
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using NUnit.Framework;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Framework.Communications;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Tests.Common;
+using OpenSim.Tests.Common.Mock;
+
+namespace OpenSim.Region.Framework.Scenes.Tests
+{
+    [TestFixture]
+    public class SceneStatisticsTests : OpenSimTestCase
+    {
+        private TestScene m_scene;
+
+        [SetUp]
+        public void Init()
+        {
+            m_scene = new SceneHelpers().SetupScene();
+        }
+
+        [Test]
+        public void TestAddRemovePhysicalLinkset()
+        {
+            Assert.That(m_scene.SceneGraph.GetActiveObjectsCount(), Is.EqualTo(0));
+
+            UUID ownerId = TestHelpers.ParseTail(0x1);
+            SceneObjectGroup so1 = SceneHelpers.CreateSceneObject(3, ownerId, "so1", 0x10);
+            so1.ScriptSetPhysicsStatus(true);
+            m_scene.AddSceneObject(so1);
+
+            Assert.That(m_scene.SceneGraph.GetTotalObjectsCount(), Is.EqualTo(3));
+            Assert.That(m_scene.SceneGraph.GetActiveObjectsCount(), Is.EqualTo(3));
+
+            m_scene.DeleteSceneObject(so1, false);
+
+            Assert.That(m_scene.SceneGraph.GetTotalObjectsCount(), Is.EqualTo(0));
+            Assert.That(m_scene.SceneGraph.GetActiveObjectsCount(), Is.EqualTo(0));
+        }
+    }
+}
\ No newline at end of file