diff --git a/apps/grgsm_decode b/apps/grgsm_decode
index 14578d5..968c1da 100755
--- a/apps/grgsm_decode
+++ b/apps/grgsm_decode
@@ -74,7 +74,7 @@
             self.receiver = grgsm.receiver(4, ([0]), ([]))
             if self.fc is not None:
                 self.input_adapter = grgsm.gsm_input(ppm=0, osr=4, fc=self.fc, samp_rate_in=samp_rate)
-                self.offset_control = grgsm.clock_offset_control(self.fc)
+                self.offset_control = grgsm.clock_offset_control(self.fc, self.samp_rate)
             else:
                 self.input_adapter = grgsm.gsm_input(ppm=0, osr=4, samp_rate_in=samp_rate)
 
diff --git a/apps/grgsm_scanner b/apps/grgsm_scanner
index 2524a63..bbda35d 100755
--- a/apps/grgsm_scanner
+++ b/apps/grgsm_scanner
@@ -76,7 +76,7 @@
             samp_rate_in=samp_rate,
         )
         self.gsm_control_channels_decoder_0 = grgsm.control_channels_decoder()
-        self.gsm_clock_offset_control_0 = grgsm.clock_offset_control(fc)
+        self.gsm_clock_offset_control_0 = grgsm.clock_offset_control(fc, samp_rate)
         self.gsm_bcch_ccch_demapper_0 = grgsm.gsm_bcch_ccch_demapper(0)
 
         ##################################################