diff --git a/src/models/MiningJob.ts b/src/models/MiningJob.ts
index f0daa34..1f35851 100644
--- a/src/models/MiningJob.ts
+++ b/src/models/MiningJob.ts
@@ -50,7 +50,8 @@ export class MiningJob {
 
         //    39th byte onwards: Optional data with no consensus meaning
         coinbaseTransaction.ins[0].script = Buffer.concat([Buffer.from([littleEndianBlockHeight.byteLength]), littleEndianBlockHeight, Buffer.alloc(8, 0)]);
-        coinbaseTransaction.addOutput(bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([segwitMagicBits, this.block.witnessCommit])]), 0);
+        const extra = Buffer.from('\\public-pool\\');
+        coinbaseTransaction.addOutput(bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([segwitMagicBits, this.block.witnessCommit, extra])]), 0);
 
         // get the non-witness coinbase tx
         //@ts-ignore