diff --git a/lib/Bytecode/Reader/Reader.cpp b/lib/Bytecode/Reader/Reader.cpp
index 7b42fee..60c8e4f 100644
--- a/lib/Bytecode/Reader/Reader.cpp
+++ b/lib/Bytecode/Reader/Reader.cpp
@@ -2409,7 +2409,7 @@
 
 /// This function completely parses a bytecode buffer given by the \p Buf
 /// and \p Length parameters.
-bool BytecodeReader::ParseBytecode(BufPtr Buf, unsigned Length,
+bool BytecodeReader::ParseBytecode(volatile BufPtr Buf, unsigned Length,
                                    const std::string &ModuleID,
                                    std::string* ErrMsg) {
 
diff --git a/lib/Bytecode/Reader/Reader.h b/lib/Bytecode/Reader/Reader.h
index 711dc89..fcf79b4 100644
--- a/lib/Bytecode/Reader/Reader.h
+++ b/lib/Bytecode/Reader/Reader.h
@@ -140,7 +140,7 @@
   /// @returns true if an error occurred
   /// @brief Main interface to parsing a bytecode buffer.
   bool ParseBytecode(
-     const unsigned char *Buf,    ///< Beginning of the bytecode buffer
+     volatile BufPtr Buf,         ///< Beginning of the bytecode buffer
      unsigned Length,             ///< Length of the bytecode buffer
      const std::string &ModuleID, ///< An identifier for the module constructed.
      std::string* ErrMsg = 0      ///< Optional place for error message