1 files changed, 3 insertions, 0 deletions
diff --git a/clang-tools-extra/clang-tidy/readability/FunctionSizeCheck.cpp b/clang-tools-extra/clang-tidy/readability/FunctionSizeCheck.cpp
index ea5f7505b69..e6410ce2134 100644
--- a/clang-tools-extra/clang-tidy/readability/FunctionSizeCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/FunctionSizeCheck.cpp
@@ -16,6 +16,7 @@ using namespace clang::ast_matchers;
 namespace clang {
 namespace tidy {
 namespace readability {
+namespace {
 
 class FunctionASTVisitor : public RecursiveASTVisitor<FunctionASTVisitor> {
   using Base = RecursiveASTVisitor<FunctionASTVisitor>;
@@ -85,6 +86,8 @@ public:
   unsigned CurrentNestingLevel = 0;
 };
 
+} // namespace
+
 FunctionSizeCheck::FunctionSizeCheck(StringRef Name, ClangTidyContext *Context)
     : ClangTidyCheck(Name, Context),
       LineThreshold(Options.get("LineThreshold", -1U)),