diff --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
@@ -32,8 +32,8 @@
 class MacroUsageCallbacks : public PPCallbacks {
 public:
   MacroUsageCallbacks(MacroUsageCheck *Check, const SourceManager &SM,
-                      StringRef RegExp, bool CapsOnly, bool IgnoreCommandLine)
-      : Check(Check), SM(SM), RegExp(RegExp), CheckCapsOnly(CapsOnly),
+                      StringRef RegExpStr, bool CapsOnly, bool IgnoreCommandLine)
+      : Check(Check), SM(SM), RegExp(RegExpStr), CheckCapsOnly(CapsOnly),
         IgnoreCommandLineMacros(IgnoreCommandLine) {}
   void MacroDefined(const Token &MacroNameTok,
                     const MacroDirective *MD) override {
@@ -47,7 +47,7 @@
       return;
 
     StringRef MacroName = MacroNameTok.getIdentifierInfo()->getName();
-    if (!CheckCapsOnly && !llvm::Regex(RegExp).match(MacroName))
+    if (!CheckCapsOnly && !RegExp.match(MacroName))
       Check->warnMacro(MD, MacroName);
 
     if (CheckCapsOnly && !isCapsOnly(MacroName))
@@ -57,7 +57,7 @@
 private:
   MacroUsageCheck *Check;
   const SourceManager &SM;
-  StringRef RegExp;
+  const llvm::Regex RegExp;
   bool CheckCapsOnly;
   bool IgnoreCommandLineMacros;
 };