diff --git a/electrum/gui/qt/request_list.py b/electrum/gui/qt/request_list.py
index b2e09339a..cb9212a9b 100644
--- a/electrum/gui/qt/request_list.py
+++ b/electrum/gui/qt/request_list.py
@@ -117,7 +117,6 @@ class RequestList(MyTreeView):
                 continue
             request_type = req['type']
             timestamp = req.get('time', 0)
-            expiration = req.get('exp', 0)
             amount = req.get('amount')
             message = req.get('message') or req.get('memo')
             date = format_time(timestamp)
diff --git a/electrum/util.py b/electrum/util.py
index 81e84c71c..f839d0fac 100644
--- a/electrum/util.py
+++ b/electrum/util.py
@@ -113,7 +113,7 @@ pr_expiration_values = {
 
 def get_request_status(req):
     status = req['status']
-    exp = req.get('exp', 0)
+    exp = req.get('exp', 0) or 0
     if req['status'] == PR_UNPAID and exp > 0 and req['time'] + req['exp'] < time.time():
         status = PR_EXPIRED
     status_str = pr_tooltips[status]
diff --git a/electrum/wallet.py b/electrum/wallet.py
index 4d7e84ee4..2ac690837 100644
--- a/electrum/wallet.py
+++ b/electrum/wallet.py
@@ -1529,7 +1529,7 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         timestamp = r.get('time', 0)
         if timestamp and type(timestamp) != int:
             timestamp = 0
-        exp = r.get('exp', 0)
+        exp = r.get('exp', 0) or 0
         paid, conf = self.get_payment_status(address, amount)
         if not paid:
             if exp > 0 and time.time() > timestamp + exp: