diff --git a/admin-interface/lib/rcon-client.rb b/admin-interface/lib/rcon-client.rb
index 17003cf..f3f0e6b 100644
--- a/admin-interface/lib/rcon-client.rb
+++ b/admin-interface/lib/rcon-client.rb
@@ -172,7 +172,7 @@ def build_packet(body, type=2, id=1, hide_content: false)
     packet_body = body
     packet_empty_string = ''
     packet = [packet_id, packet_type, packet_body, packet_empty_string] # Skip size for now
-    size = packet.pack(@@pack_string[1..]).length # Get packet size by packing what we have and checking length.
+    size = packet.pack(@@pack_string[2..]).length # Get packet size by packing what we have and checking length.
     packet.unshift(size)
     # log "Packet: " << packet.inspect
     packed = packet.pack(@@pack_string)