1 files changed, 2 insertions, 0 deletions
diff --git a/clang-tools-extra/clangd/index/FileIndex.cpp b/clang-tools-extra/clangd/index/FileIndex.cpp
index 1f3cc38d25b..43e8d322f4b 100644
--- a/clang-tools-extra/clangd/index/FileIndex.cpp
+++ b/clang-tools-extra/clangd/index/FileIndex.cpp
@@ -20,6 +20,8 @@ std::unique_ptr<SymbolSlab> indexAST(ASTContext &Ctx,
                                      std::shared_ptr<Preprocessor> PP,
                                      llvm::ArrayRef<const Decl *> Decls) {
   SymbolCollector::Options CollectorOpts;
+  // Code completion gets main-file results from Sema.
+  // But we leave this option on because features like go-to-definition want it.
   CollectorOpts.IndexMainFiles = true;
   auto Collector = std::make_shared<SymbolCollector>(std::move(CollectorOpts));
   Collector->setPreprocessor(std::move(PP));