diff --git a/platypush/backend/bluetooth/scanner/__init__.py b/platypush/backend/bluetooth/scanner/__init__.py
index e144e7f4..a0f220ee 100644
--- a/platypush/backend/bluetooth/scanner/__init__.py
+++ b/platypush/backend/bluetooth/scanner/__init__.py
@@ -85,7 +85,7 @@ class BluetoothScannerBackend(SensorBackend):
             return super().get_measurement()
 
     def process_data(  # lgtm [py/inheritance/signature-mismatch]
-        self, *, data: Dict[str, dict], new_data: Dict[str, dict]
+        self, data: Dict[str, dict], new_data: Optional[Dict[str, dict]] = None, **_
     ):
         for addr, dev in data.items():
             self._add_last_seen_device(dev)
diff --git a/platypush/backend/linode/__init__.py b/platypush/backend/linode/__init__.py
index 5b1f673a..756eb275 100644
--- a/platypush/backend/linode/__init__.py
+++ b/platypush/backend/linode/__init__.py
@@ -25,7 +25,7 @@ class LinodeBackend(SensorBackend):
         super().__init__(plugin='linode', poll_seconds=poll_seconds, **kwargs)
         self.instances = set(instances or [])
 
-    def process_data(self, *, data: Dict[str, dict], **kwargs):
+    def process_data(self, data: Dict[str, dict], new_data: Optional[Dict[str, dict]] = None, **kwargs):
         instances = data['instances']
         old_instances = (self.data or {}).get('instances', {})
 
diff --git a/platypush/backend/sensor/__init__.py b/platypush/backend/sensor/__init__.py
index 556a5cf9..a0c0cd4c 100644
--- a/platypush/backend/sensor/__init__.py
+++ b/platypush/backend/sensor/__init__.py
@@ -174,9 +174,9 @@ class SensorBackend(Backend):
         if plugin and hasattr(plugin, 'close'):
             plugin.close()
 
-    def process_data(self, new_data, *_, **__):
-        if new_data is not None and new_data not in ({}, []):
-            self.bus.post(SensorDataChangeEvent(data=new_data, source=self.plugin or self.__class__.__name__))
+    def process_data(self, data, new_data=None, **__):
+        if data is not None and data not in ({}, []):
+            self.bus.post(SensorDataChangeEvent(data=data, source=self.plugin or self.__class__.__name__))
 
     def run(self):
         super().run()