diff --git a/clang-tools-extra/clang-doc/Representation.h b/clang-tools-extra/clang-doc/Representation.h
index b0b34fc6f08dd..77d0a8a238cb1 100644
--- a/clang-tools-extra/clang-doc/Representation.h
+++ b/clang-tools-extra/clang-doc/Representation.h
@@ -527,6 +527,7 @@ struct ClangDocContext {
   std::vector<std::string> UserStylesheets;
   // JavaScript files that will be imported in all HTML files.
   std::vector<std::string> JsScripts;
+  // Base directory for remote repositories.
   StringRef Base;
   Index Idx;
 };