diff --git a/src/plugins/clangrefactoring/clangqueryprojectsfindfilter.cpp b/src/plugins/clangrefactoring/clangqueryprojectsfindfilter.cpp
index 2289746db34..d4e210c04e8 100644
--- a/src/plugins/clangrefactoring/clangqueryprojectsfindfilter.cpp
+++ b/src/plugins/clangrefactoring/clangqueryprojectsfindfilter.cpp
@@ -85,7 +85,7 @@ void ClangQueryProjectsFindFilter::requestSourceRangesAndDiagnostics(const QStri
     ClangBackEnd::RequestSourceRangesAndDiagnosticsForQueryMessage message(queryText,
                                                                            {ClangBackEnd::FilePath(filePath),
                                                                             exampleContent,
-                                                                            {"cc", toNative(filePath)}});
+                                                                            {"cc",  "-std=c++1z", toNative(filePath)}});
 
     m_server.requestSourceRangesAndDiagnosticsForQueryMessage(std::move(message));
 }