diff --git a/python/fcch_burst_tagger.py b/python/fcch_burst_tagger.py
index 5142096..c14f7fb 100644
--- a/python/fcch_burst_tagger.py
+++ b/python/fcch_burst_tagger.py
@@ -23,7 +23,7 @@
 from pylab import *
 from gnuradio import gr
 import pmt
-from scipy.signal.chirpz import ZoomFFT
+from gsm.chirpz import ZoomFFT
 
 class fcch_burst_tagger(gr.sync_block):
     """