diff --git a/lib/packets/packet.js b/lib/packets/packet.js
index b9e7755bd4..d4cd24e81d 100644
--- a/lib/packets/packet.js
+++ b/lib/packets/packet.js
@@ -832,11 +832,10 @@ class Packet {
     if (n === null) {
       return this.writeInt8(0xfb);
     }
-    // TODO: check that n is out of int precision
     this.writeInt8(0xfe);
-    this.buffer.writeUInt32LE(n, this.offset);
+    this.buffer.writeUInt32LE(n & 0xffffffff, this.offset);
     this.offset += 4;
-    this.buffer.writeUInt32LE(n >> 32, this.offset);
+    this.buffer.writeUInt32LE(Math.floor(n / 0x100000000), this.offset);
     this.offset += 4;
     return this.offset;
   }