diff --git a/src/or/rendservice.c b/src/or/rendservice.c
index 3afe880554..d6bd5b1f75 100644
--- a/src/or/rendservice.c
+++ b/src/or/rendservice.c
@@ -984,7 +984,7 @@ rend_service_sos_poison_path(const rend_service_t *service)
   return rend_service_path(service, sos_poison_fname);
 }
 
-/** Return True if hidden services <b>service> has been poisoned by single
+/** Return True if hidden services <b>service</b> has been poisoned by single
  * onion mode. */
 static int
 service_is_single_onion_poisoned(const rend_service_t *service)