diff --git a/src/OptionHandlerFactory.cc b/src/OptionHandlerFactory.cc
index f8b99b5f..ac24a33a 100644
--- a/src/OptionHandlerFactory.cc
+++ b/src/OptionHandlerFactory.cc
@@ -225,6 +225,7 @@ OptionHandlers OptionHandlerFactory::createOptionHandlers()
                                      TEXT_ENABLE_DIRECT_IO,
                                      A2_V_TRUE,
                                      OptionHandler::OPT_ARG))));
+    op->addTag(TAG_DEPRECATED);
     op->addTag(TAG_ADVANCED);
     op->addTag(TAG_FILE);
     handlers.push_back(op);
@@ -1752,6 +1753,7 @@ OptionHandlers OptionHandlerFactory::createOptionHandlers()
       TAG_FILE,
       TAG_RPC,
       TAG_EXPERIMENTAL,
+      TAG_DEPRECATED,
       TAG_HELP,
       TAG_ALL
     };
diff --git a/src/help_tags.h b/src/help_tags.h
index a9348cba..54494ae1 100644
--- a/src/help_tags.h
+++ b/src/help_tags.h
@@ -47,6 +47,7 @@
 #define TAG_FILE "#file"
 #define TAG_RPC "#rpc"
 #define TAG_EXPERIMENTAL "#experimental"
+#define TAG_DEPRECATED "#deprecated"
 #define TAG_HELP "#help"
 #define TAG_ALL "#all"