diff --git a/src/plugins/clangtools/documentclangtoolrunner.cpp b/src/plugins/clangtools/documentclangtoolrunner.cpp
index a73df0e89b7..7cae31be1c2 100644
--- a/src/plugins/clangtools/documentclangtoolrunner.cpp
+++ b/src/plugins/clangtools/documentclangtoolrunner.cpp
@@ -218,30 +218,21 @@ void DocumentClangToolRunner::run()
     runNext();
 }
 
-QPair<FilePath, QString> getClangIncludeDirAndVersion(ClangToolRunner *runner)
-{
-    static QMap<FilePath, QPair<FilePath, QString>> cache;
-    const FilePath tool = runner->executable();
-    auto it = cache.find(tool);
-    if (it == cache.end())
-        it = cache.insert(tool, getClangIncludeDirAndVersion(tool));
-    return it.value();
-}
-
 void DocumentClangToolRunner::runNext()
 {
     if (m_currentRunner)
         m_currentRunner.release()->deleteLater();
     m_currentRunner.reset(m_runnerCreators.isEmpty() ? nullptr : m_runnerCreators.takeFirst()());
     if (m_currentRunner) {
-        auto [clangIncludeDir, clangVersion] = getClangIncludeDirAndVersion(m_currentRunner.get());
+        const auto [clangIncludeDir, clangVersion] = getClangIncludeDirAndVersion(
+                                                     m_currentRunner->executable());
         qCDebug(LOG) << Q_FUNC_INFO << m_currentRunner->executable() << clangIncludeDir
                      << clangVersion << m_fileInfo.file;
         if (m_currentRunner->executable().isEmpty() || clangIncludeDir.isEmpty() || clangVersion.isEmpty()
             || (m_document->isModified() && !m_currentRunner->supportsVFSOverlay())) {
             runNext();
         } else {
-            AnalyzeUnit unit(m_fileInfo, clangIncludeDir, clangVersion);
+            const AnalyzeUnit unit(m_fileInfo, clangIncludeDir, clangVersion);
             QTC_ASSERT(FilePath::fromString(unit.file).exists(), runNext(); return;);
             m_currentRunner->setVFSOverlay(vfso().overlayFilePath().toString());
             if (!m_currentRunner->run(unit.file, unit.arguments))
diff --git a/src/plugins/clangtools/executableinfo.cpp b/src/plugins/clangtools/executableinfo.cpp
index c914832d8ce..ffdd635b5f1 100644
--- a/src/plugins/clangtools/executableinfo.cpp
+++ b/src/plugins/clangtools/executableinfo.cpp
@@ -214,7 +214,7 @@ QString queryVersion(const FilePath &clangToolPath, QueryFailMode failMode)
     return {};
 }
 
-QPair<FilePath, QString> getClangIncludeDirAndVersion(const FilePath &clangToolPath)
+static QPair<FilePath, QString> clangIncludeDirAndVersion(const FilePath &clangToolPath)
 {
     const FilePath dynamicResourceDir = queryResourceDir(clangToolPath);
     const QString dynamicVersion = queryVersion(clangToolPath, QueryFailMode::Noisy);
@@ -223,6 +223,15 @@ QPair<FilePath, QString> getClangIncludeDirAndVersion(const FilePath &clangToolP
     return {dynamicResourceDir / "include", dynamicVersion};
 }
 
+QPair<FilePath, QString> getClangIncludeDirAndVersion(const FilePath &clangToolPath)
+{
+    static QMap<FilePath, QPair<FilePath, QString>> cache;
+    auto it = cache.find(clangToolPath);
+    if (it == cache.end())
+        it = cache.insert(clangToolPath, clangIncludeDirAndVersion(clangToolPath));
+    return it.value();
+}
+
 QHash<Utils::FilePath, QPair<QDateTime, ClazyStandaloneInfo>> ClazyStandaloneInfo::cache;
 
 } // namespace Internal