diff --git a/packages/primitives/src/transaction.ts b/packages/primitives/src/transaction.ts
index a29c1c4..399e9ff 100644
--- a/packages/primitives/src/transaction.ts
+++ b/packages/primitives/src/transaction.ts
@@ -109,6 +109,7 @@ export class Transaction {
 
   public isCoinbase(): boolean {
     // TODO: This definitely needs checking.
+    // TODO: You're a moron Jim. outpointTransactionHash is 0x00 x 32 for Coinbase.
 
     // A coinbase transaction MUST only have one input.
     if (this.getInputs().length > 1) {