diff --git a/src/or/routerparse.c b/src/or/routerparse.c
index fa79cf7132..0f6113ccfc 100644
--- a/src/or/routerparse.c
+++ b/src/or/routerparse.c
@@ -2585,7 +2585,7 @@ routerstatus_parse_entry_from_string(memarea_t *area,
       goto err;
     }
   } else if (flav == FLAV_MICRODESC) {
-    offset = -1; /* There is no identity digest */
+    offset = -1; /* There is no descriptor digest in an md consensus r line */
   }
 
   if (vote_rs) {