Grammar import error

[emanuelqueiroga]

Hello. I use pocketsphinx with speech_recognizer.
I'm calling the sphinx method and I have this error every time.
TypeError: recognize_sphinx() got an unexpected keyword argument 'grammar'
My call is
with sr.Microphone() as source:
audio = r.listen(source)
text = r.recognize_sphinx(audio, grammar='palavras.gramm')
and my grammar is correct. Anyone know what could be happening? Without the gramar it works normally.