diff --git a/hw/9pfs/coth.h b/hw/9pfs/coth.h
index f83c7dda7b..1a1edbdc2a 100644
--- a/hw/9pfs/coth.h
+++ b/hw/9pfs/coth.h
@@ -19,7 +19,7 @@
 #include "qemu/coroutine.h"
 #include "9p.h"
 
-/**
+/*
  * we want to use bottom half because we want to make sure the below
  * sequence of events.
  *
@@ -29,7 +29,7 @@
  * we cannot swap step 1 and 2, because that would imply worker thread
  * can enter coroutine while step1 is still running
  *
- * @b PERFORMANCE @b CONSIDERATIONS: As a rule of thumb, keep in mind
+ * PERFORMANCE CONSIDERATIONS: As a rule of thumb, keep in mind
  * that hopping between threads adds @b latency! So when handling a
  * 9pfs request, avoid calling v9fs_co_run_in_worker() too often, because
  * this might otherwise sum up to a significant, huge overall latency for