diff --git a/src/controller/python/chip/ChipDeviceCtrl.py b/src/controller/python/chip/ChipDeviceCtrl.py
index d43340b6f89da3..6e90b396b2aafb 100644
--- a/src/controller/python/chip/ChipDeviceCtrl.py
+++ b/src/controller/python/chip/ChipDeviceCtrl.py
@@ -345,7 +345,7 @@ def SetWiFiCredentials(self, ssid, credentials):
 
         return self._ChipStack.Call(
             lambda: self._dmLib.pychip_DeviceController_SetWiFiCredentials(
-                ssid.encode("utf-8"), credentials.encode("utf-8"))
+                ssid, credentials)
         )
 
     def SetThreadOperationalDataset(self, threadOperationalDataset):