diff --git a/projectq/backends/_ibm/_ibm_http_client.py b/projectq/backends/_ibm/_ibm_http_client.py
index 83b054fcd..954a94521 100755
--- a/projectq/backends/_ibm/_ibm_http_client.py
+++ b/projectq/backends/_ibm/_ibm_http_client.py
@@ -157,7 +157,7 @@ def _get_result(device, execution_id, access_token, num_retries=3000,
         r_json = r.json()
         if 'qasms' in r_json:
             qasm = r_json['qasms'][0]
-            if 'result' in qasm:
+            if 'result' in qasm and qasm['result'] is not None:
                 return qasm['result']
         time.sleep(interval)
         if device in ['ibmqx4', 'ibmqx5'] and retries % 60 == 0: