diff --git a/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs b/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
index 7bb88b9af6..e7f498130a 100644
--- a/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
@@ -580,6 +580,9 @@ namespace OpenSim.Region.CoreModules.Asset
 
                 if (m_MemoryCacheEnabled)
                     m_MemoryCache.Remove(id);
+
+                lock(weakAssetReferencesLock)
+                    weakAssetReferences.Remove(id);
             }
             catch (Exception e)
             {