diff --git a/lib/paymentrequest.py b/lib/paymentrequest.py
index b0ce36ae..3b2a5c6d 100644
--- a/lib/paymentrequest.py
+++ b/lib/paymentrequest.py
@@ -112,7 +112,8 @@ class PaymentRequest:
         if not ca_list:
             self.error = "Trusted certificate authorities list not found"
             return False
-        paymntreq = self.data
+        paymntreq = pb2.PaymentRequest()
+        paymntreq.ParseFromString(self.raw)
         if not paymntreq.signature:
             self.error = "No signature"
             return