diff --git a/examples/bluetooth/ble_simple_central.py b/examples/bluetooth/ble_simple_central.py
index a6bbdc6ee..3c0cf2a0d 100644
--- a/examples/bluetooth/ble_simple_central.py
+++ b/examples/bluetooth/ble_simple_central.py
@@ -179,7 +179,7 @@ class BLESimpleCentral:
 
     # Disconnect from current device.
     def disconnect(self):
-        if not self._conn_handle:
+        if self._conn_handle is None:
             return
         self._ble.gap_disconnect(self._conn_handle)
         self._reset()
diff --git a/examples/bluetooth/ble_temperature_central.py b/examples/bluetooth/ble_temperature_central.py
index 96c4aad14..80e3c3fb3 100644
--- a/examples/bluetooth/ble_temperature_central.py
+++ b/examples/bluetooth/ble_temperature_central.py
@@ -196,7 +196,7 @@ class BLETemperatureCentral:
 
     # Disconnect from current device.
     def disconnect(self):
-        if not self._conn_handle:
+        if self._conn_handle is None:
             return
         self._ble.gap_disconnect(self._conn_handle)
         self._reset()