diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionSourceCode.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionSourceCode.cpp
index a429963277d1..937dbc00521e 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionSourceCode.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionSourceCode.cpp
@@ -231,7 +231,7 @@ TokenVerifier::TokenVerifier(std::string body) {
   Opts.CPlusPlus17 = true;
   Opts.LineComment = true;
 
-  Lexer lex(FID, buf.get(), SM, Opts);
+  Lexer lex(FID, buf->getMemBufferRef(), SM, Opts);
 
   Token token;
   bool exit = false;
diff --git a/lldb/source/Plugins/Language/ClangCommon/ClangHighlighter.cpp b/lldb/source/Plugins/Language/ClangCommon/ClangHighlighter.cpp
index aaf578c6f728..f3194beff1ec 100644
--- a/lldb/source/Plugins/Language/ClangCommon/ClangHighlighter.cpp
+++ b/lldb/source/Plugins/Language/ClangCommon/ClangHighlighter.cpp
@@ -178,7 +178,7 @@ void ClangHighlighter::Highlight(const HighlightStyle &options,
   Opts.CPlusPlus17 = true;
   Opts.LineComment = true;
 
-  Lexer lex(FID, buf.get(), SM, Opts);
+  Lexer lex(FID, buf->getMemBufferRef(), SM, Opts);
   // The lexer should keep whitespace around.
   lex.SetKeepWhitespaceMode(true);