diff --git a/src/runtime/Makefile b/src/runtime/Makefile
index f936bd796c..9c6dc521a3 100644
--- a/src/runtime/Makefile
+++ b/src/runtime/Makefile
@@ -175,7 +175,7 @@ DEFVIRTIOFSCACHE ?= auto
 #
 # see `virtiofsd -h` for possible options.
 # Make sure you quote args.
-DEFVIRTIOFSEXTRAARGS ?= [\"--thread-pool-size=1\"]
+DEFVIRTIOFSEXTRAARGS ?= [\"--thread-pool-size=1\", \"-o\", \"announce_submounts\"]
 DEFENABLEIOTHREADS := false
 DEFENABLEVHOSTUSERSTORE := false
 DEFVHOSTUSERSTOREPATH := $(PKGRUNDIR)/vhost-user