diff --git a/src/routes/mod.js b/src/routes/mod.js
index e9e4d18d..2387660b 100644
--- a/src/routes/mod.js
+++ b/src/routes/mod.js
@@ -130,6 +130,11 @@ router.post('/ban', async (req, res) => {
       ipsToBan = banUser.IPAddresses;
     }
 
+    // Safety mechanism. Don't allow percies to do the full IP ban.
+    if (userIsPercy) {
+      ipsToBan = banUser.lastIPAddress;
+    }
+
     // Get duration for ban:
     const now = new Date();
     const whenMade = new Date();