diff --git a/api/ble.py b/api/ble.py
index 068f00a..7514d52 100644
--- a/api/ble.py
+++ b/api/ble.py
@@ -209,8 +209,8 @@ def sensor_data_query(mac_list: List[str]) -> List[dict]:
         except Exception as e:
             print(f"Error reading BLE data - {e}")
             this_result = None
-        if e and "org.freedesktop.DBus.Error.AccessDenied" in e:
-            return result
+            if "org.freedesktop.DBus.Error.AccessDenied" in e:
+                return result
         if this_result:
             result.append(
                 {"name": mac, "temp": this_result.temperature, "humidity": this_result.humidity}