diff --git a/simgear/scene/material/mat.cxx b/simgear/scene/material/mat.cxx
index 5141807e..6b23d310 100644
--- a/simgear/scene/material/mat.cxx
+++ b/simgear/scene/material/mat.cxx
@@ -96,7 +96,7 @@ void SGMaterial::_internal_state::add_texture(const std::string &t, int i)
 SGMaterial::SGMaterial( const SGReaderWriterOptions* options,
                         const SGPropertyNode *props,
                         SGPropertyNode *prop_root,
-                        AreaList *a,
+                        std::shared_ptr<AreaList> a,
 						SGSharedPtr<const SGCondition> c)
 {
     init();
@@ -109,7 +109,7 @@ SGMaterial::SGMaterial( const SGReaderWriterOptions* options,
 SGMaterial::SGMaterial( const osgDB::Options* options,
                         const SGPropertyNode *props,
                         SGPropertyNode *prop_root,
-                        AreaList *a,
+                        std::shared_ptr<AreaList> a,
                         SGSharedPtr<const SGCondition> c)
 {
     osg::ref_ptr<SGReaderWriterOptions> opt;
@@ -412,7 +412,6 @@ SGMaterial::read_properties(const SGReaderWriterOptions* options,
     if (props->hasChild("parameters")) {
         parameters = props->getChild("parameters");
     } else {
-        // REVIEW: Memory Leak - 61,560 bytes in 405 blocks are definitely lost
         parameters = new SGPropertyNode();
     }
 }
diff --git a/simgear/scene/material/mat.hxx b/simgear/scene/material/mat.hxx
index c48caf9b..60f2c229 100644
--- a/simgear/scene/material/mat.hxx
+++ b/simgear/scene/material/mat.hxx
@@ -31,6 +31,7 @@
 #include <string>      // Standard C++ string library
 #include <vector>
 #include <map>
+#include <memory>
 #include <mutex>
 
 #include "Effect.hxx"
@@ -96,15 +97,15 @@ public:
   SGMaterial(const osgDB::Options*,
              const SGPropertyNode *props,
              SGPropertyNode *prop_root,
-             AreaList *a,
-			 SGSharedPtr<const SGCondition> c);
+             std::shared_ptr<AreaList> a,
+             SGSharedPtr<const SGCondition> c);
 
 
   SGMaterial(const simgear::SGReaderWriterOptions*,
              const SGPropertyNode *props,
              SGPropertyNode *prop_root,
-             AreaList *a,
-			 SGSharedPtr<const SGCondition> c);
+             std::shared_ptr<AreaList> a,
+             SGSharedPtr<const SGCondition> c);
 
   /**
    * Destructor.
@@ -512,10 +513,10 @@ private:
   SGSharedPtr<const SGCondition> condition;
 
   // List of geographical rectangles for this material
-  AreaList* areas;
+  std::shared_ptr<AreaList> areas;
 
   // Parameters from the materials file
-  const SGPropertyNode* parameters;
+  SGConstPropertyNode_ptr parameters;
 
   // per-material lock for entrypoints called from multiple threads
   std::mutex _lock;