diff --git a/freedata_server/modulator.py b/freedata_server/modulator.py
index 6dbe2147..6dcbf2b5 100644
--- a/freedata_server/modulator.py
+++ b/freedata_server/modulator.py
@@ -121,7 +121,7 @@ class Modulator:
             codec2.FREEDV_MODE.datac14: self.freedv_datac14_tx,
             codec2.FREEDV_MODE.data_ofdm_500: self.data_ofdm_500_tx,
             codec2.FREEDV_MODE.data_ofdm_2438: self.data_ofdm_2438_tx,
-            codec2.FREEDV_MODE.qam16c2: self.freedv_qam16c2_tx,
+            #codec2.FREEDV_MODE.qam16c2: self.freedv_qam16c2_tx,
             #codec2.FREEDV_MODE.data_qam_2438: self.freedv_data_qam_2438_tx,
         }
         if mode in mode_transition: