diff --git a/clang/lib/Frontend/DiagnosticRenderer.cpp b/clang/lib/Frontend/DiagnosticRenderer.cpp
index df426af..b6c9564 100644
--- a/clang/lib/Frontend/DiagnosticRenderer.cpp
+++ b/clang/lib/Frontend/DiagnosticRenderer.cpp
@@ -324,8 +324,8 @@
   SmallVector<FileID, 4> EndArgExpansions;
   getMacroArgExpansionFileIDs(Begin, BeginArgExpansions, /*IsBegin=*/true, SM);
   getMacroArgExpansionFileIDs(End, EndArgExpansions, /*IsBegin=*/false, SM);
-  std::sort(BeginArgExpansions.begin(), BeginArgExpansions.end());
-  std::sort(EndArgExpansions.begin(), EndArgExpansions.end());
+  llvm::sort(BeginArgExpansions.begin(), BeginArgExpansions.end());
+  llvm::sort(EndArgExpansions.begin(), EndArgExpansions.end());
   std::set_intersection(BeginArgExpansions.begin(), BeginArgExpansions.end(),
                         EndArgExpansions.begin(), EndArgExpansions.end(),
                         std::back_inserter(CommonArgExpansions));