diff --git a/python/receiver/fcch_detector.py b/python/receiver/fcch_detector.py
index 627dd00..70a3459 100644
--- a/python/receiver/fcch_detector.py
+++ b/python/receiver/fcch_detector.py
@@ -13,7 +13,7 @@
 from gnuradio import blocks
 from gnuradio import gr
 from gnuradio.filter import firdes
-import gsm
+import grgsm
 
 class fcch_detector(gr.hier_block2):
 
@@ -38,7 +38,7 @@
         ##################################################
         # Blocks
         ##################################################
-        self.gsm_fcch_burst_tagger_0 = gsm.fcch_burst_tagger(OSR)
+        self.gsm_fcch_burst_tagger_0 = grgsm.fcch_burst_tagger(OSR)
         self.blocks_threshold_ff_0_0 = blocks.threshold_ff(0, 0, 0)
         self.blocks_threshold_ff_0 = blocks.threshold_ff(int((138)*samp_rate/f_symb), int((138)*samp_rate/f_symb), 0)
         self.blocks_multiply_conjugate_cc_0 = blocks.multiply_conjugate_cc(1)