diff --git a/core/fpdfapi/parser/cfdf_document.cpp b/core/fpdfapi/parser/cfdf_document.cpp
index d0cf638..739fefa 100644
--- a/core/fpdfapi/parser/cfdf_document.cpp
+++ b/core/fpdfapi/parser/cfdf_document.cpp
@@ -35,9 +35,8 @@
   return pDoc->m_pRootDict ? std::move(pDoc) : nullptr;
 }
 
-void CFDF_Document::ParseStream(
-    const RetainPtr<IFX_SeekableReadStream>& pFile) {
-  m_pFile = pFile;
+void CFDF_Document::ParseStream(RetainPtr<IFX_SeekableReadStream> pFile) {
+  m_pFile = std::move(pFile);
   CPDF_SyntaxParser parser(m_pFile);
   while (1) {
     bool bNumber;
diff --git a/core/fpdfapi/parser/cfdf_document.h b/core/fpdfapi/parser/cfdf_document.h
index 55871e7..3c93a5e 100644
--- a/core/fpdfapi/parser/cfdf_document.h
+++ b/core/fpdfapi/parser/cfdf_document.h
@@ -29,7 +29,7 @@
   CPDF_Dictionary* GetRoot() const { return m_pRootDict.Get(); }
 
  private:
-  void ParseStream(const RetainPtr<IFX_SeekableReadStream>& pFile);
+  void ParseStream(RetainPtr<IFX_SeekableReadStream> pFile);
 
   UnownedPtr<CPDF_Dictionary> m_pRootDict;
   RetainPtr<IFX_SeekableReadStream> m_pFile;