diff --git a/lnbits/bolt11.py b/lnbits/bolt11.py
index e09fb9d9..7f91d01a 100644
--- a/lnbits/bolt11.py
+++ b/lnbits/bolt11.py
@@ -30,7 +30,6 @@ class Invoice:
     secret: Optional[str] = None
     route_hints: List[Route] = []
     min_final_cltv_expiry: int = 18
-    checking_id: Optional[str] = None
 
 
 def decode(pr: str) -> Invoice:
diff --git a/lnbits/wallets/fake.py b/lnbits/wallets/fake.py
index 85a0dfb1..62f2bc44 100644
--- a/lnbits/wallets/fake.py
+++ b/lnbits/wallets/fake.py
@@ -80,7 +80,7 @@ class FakeWallet(Wallet):
     async def pay_invoice(self, bolt11: str, _: int) -> PaymentResponse:
         invoice = decode(bolt11)
 
-        if invoice.checking_id and invoice.checking_id[:6] == self.privkey[:6]:
+        if invoice.payment_hash[:6] == self.privkey[:6]:
             await self.queue.put(invoice)
             return PaymentResponse(True, invoice.payment_hash, 0)
         else: