class declaration?

for the following two files, it has a problem of recursive inclusion.
Is there a mechanism like class declaration to solve the problem?

---header1.h---
#include "header2.h"

class class1{
public:
   void method1(class2 &ins);
};

--header2.h---
#include "header1.h"

class class2{
  class1 *ptr;
public:
  ...
};