diff --git a/src/Input/input.cxx b/src/Input/input.cxx
index 54cecb9c2..5d2f207d8 100644
--- a/src/Input/input.cxx
+++ b/src/Input/input.cxx
@@ -94,11 +94,6 @@ FGBinding::FGBinding (const SGPropertyNode * node)
   read(node);
 }
 
-FGBinding::~FGBinding ()
-{
-  delete _arg;                       // Delete the saved arguments
-}
-
 void
 FGBinding::read (const SGPropertyNode * node)
 {
@@ -113,7 +108,6 @@ FGBinding::read (const SGPropertyNode * node)
     return;
   }
 
-  delete _arg;
   _arg = new SGPropertyNode;
   _setting = 0;
   copyProperties(node, _arg);  // FIXME: don't use whole node!!!
diff --git a/src/Input/input.hxx b/src/Input/input.hxx
index c3f980f0d..9e043a7bb 100644
--- a/src/Input/input.hxx
+++ b/src/Input/input.hxx
@@ -83,7 +83,7 @@ public:
   /**
    * Destructor.
    */
-  virtual ~FGBinding ();
+  virtual ~FGBinding () {}
 
 
   /**
@@ -148,7 +148,7 @@ private:
 
   string _command_name;
   mutable SGCommandMgr::command_t _command;
-  mutable SGPropertyNode * _arg;
+  mutable SGPropertyNode_ptr _arg;
   mutable SGPropertyNode_ptr _setting;
 };