1 files changed, 5 insertions, 2 deletions
diff --git a/core/fpdfdoc/cpdf_numbertree.h b/core/fpdfdoc/cpdf_numbertree.h
index bfe44fddb9..843e186208 100644
--- a/core/fpdfdoc/cpdf_numbertree.h
+++ b/core/fpdfdoc/cpdf_numbertree.h
@@ -7,17 +7,20 @@
 #ifndef CORE_FPDFDOC_CPDF_NUMBERTREE_H_
 #define CORE_FPDFDOC_CPDF_NUMBERTREE_H_
 
+#include "core/fxcrt/cfx_unowned_ptr.h"
+
 class CPDF_Dictionary;
 class CPDF_Object;
 
 class CPDF_NumberTree {
  public:
-  explicit CPDF_NumberTree(CPDF_Dictionary* pRoot) : m_pRoot(pRoot) {}
+  explicit CPDF_NumberTree(CPDF_Dictionary* pRoot);
+  ~CPDF_NumberTree();
 
   CPDF_Object* LookupValue(int num) const;
 
  protected:
-  CPDF_Dictionary* const m_pRoot;
+  CFX_UnownedPtr<CPDF_Dictionary> const m_pRoot;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_NUMBERTREE_H_