diff --git a/Sources/Plasma/PubUtilLib/plClientResMgr/plClientResMgr.cpp b/Sources/Plasma/PubUtilLib/plClientResMgr/plClientResMgr.cpp
index 430d2232..8a2eb472 100644
--- a/Sources/Plasma/PubUtilLib/plClientResMgr/plClientResMgr.cpp
+++ b/Sources/Plasma/PubUtilLib/plClientResMgr/plClientResMgr.cpp
@@ -54,7 +54,8 @@ plClientResMgr::~plClientResMgr()
         std::map<std::string, plMipmap*>::iterator it;
 
         for (it = this->ClientResources->begin(); it != this->ClientResources->end(); ++it) {
-            it->second->UnRef();
+            if (it->second)
+                it->second->UnRef();
         }
 
         delete this->ClientResources;