diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index b7466bea14..a600b86cde 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -585,12 +585,12 @@ 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)