diff --git a/clang-tools-extra/clangd/SemanticHighlighting.cpp b/clang-tools-extra/clangd/SemanticHighlighting.cpp
--- a/clang-tools-extra/clangd/SemanticHighlighting.cpp
+++ b/clang-tools-extra/clangd/SemanticHighlighting.cpp
@@ -28,6 +28,10 @@
   HighlightingTokenCollector(ParsedAST &AST)
       : Ctx(AST.getASTContext()), SM(AST.getSourceManager()) {}
 
+  // Only highlight nodes that map to source code, skip implicitly generated
+  // code.
+  bool shouldVisitImplicitCode() const { return false; }
+
   std::vector<HighlightingToken> collectTokens() {
     Tokens.clear();
     TraverseAST(Ctx);