2 files changed, 6 insertions, 4 deletions
diff --git a/core/fxcrt/include/fx_basic.h b/core/fxcrt/include/fx_basic.h
index d3dce8c749..848429e8f3 100644
--- a/core/fxcrt/include/fx_basic.h
+++ b/core/fxcrt/include/fx_basic.h
@@ -911,11 +911,13 @@ typedef CFX_ListArrayTemplate<CFX_SortListArray<sizeof(FX_FILESIZE)>,
                               FX_FILESIZE> CFX_FileSizeListArray;
 
 #ifdef PDF_ENABLE_XFA
-class IFX_Unknown {
+class IFX_Retainable {
  public:
-  virtual ~IFX_Unknown() {}
+  virtual uint32_t Retain() = 0;
   virtual uint32_t Release() = 0;
-  virtual uint32_t AddRef() = 0;
+
+ protected:
+  virtual ~IFX_Retainable() {}
 };
 #define FX_IsOdd(a) ((a)&1)
 #endif  // PDF_ENABLE_XFA
diff --git a/core/fxcrt/include/fx_ucd.h b/core/fxcrt/include/fx_ucd.h
index 0eb159d703..fbf3187c86 100644
--- a/core/fxcrt/include/fx_ucd.h
+++ b/core/fxcrt/include/fx_ucd.h
@@ -189,7 +189,7 @@ class CFX_RTFChar : public CFX_Char {
   int16_t m_iBidiOrder;
   uint32_t m_dwLayoutStyles;
   uint32_t m_dwIdentity;
-  IFX_Unknown* m_pUserData;
+  IFX_Retainable* m_pUserData;
 };
 typedef CFX_ArrayTemplate<CFX_RTFChar> CFX_RTFCharArray;
 #endif  // PDF_ENABLE_XFA