diff --git a/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.h b/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.h
index 28d923d9d543..163c353681bc 100644
--- a/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.h
+++ b/clang-tools-extra/clang-tidy/ClangTidyDiagnosticConsumer.h
@@ -174,7 +174,8 @@ public:
     return DiagLevelAndFormatString(
         static_cast<DiagnosticIDs::Level>(
             DiagEngine->getDiagnosticLevel(DiagnosticID, Loc)),
-        DiagEngine->getDiagnosticIDs()->getDescription(DiagnosticID));
+        std::string(
+            DiagEngine->getDiagnosticIDs()->getDescription(DiagnosticID)));
   }
 
 private: