diff --git a/routes/api/post.js b/routes/api/post.js
index e3e301a..73d18c1 100644
--- a/routes/api/post.js
+++ b/routes/api/post.js
@@ -82,7 +82,7 @@ export const setup = function (router, con, server) {
                 message: "invalid pid given"
             }
         }
-        PIDS[req.body.pid] = "already_used";
+        PIDS[pid] = "already_used";
     }
 
     function validateReplyID(rid) {