diff --git a/apps/grgsm_scanner b/apps/grgsm_scanner
index 94bba43..ebfdb7a 100755
--- a/apps/grgsm_scanner
+++ b/apps/grgsm_scanner
@@ -77,7 +77,7 @@
         )
         self.gsm_control_channels_decoder_0 = grgsm.control_channels_decoder()
         self.gsm_clock_offset_control_0 = grgsm.clock_offset_control(fc)
-        self.gsm_bcch_ccch_demapper_0 = grgsm.universal_ctrl_chans_demapper(0, ([2,6,12,16,22,26,32,36,42,46]), ([1,2,2,2,2,2,2,2,2,2]))
+        self.gsm_bcch_ccch_demapper_0 = grgsm.gsm_bcch_ccch_demapper(0)
 
         ##################################################
         # Connections