diff --git a/grc/satnogs_coarse_doppler_correction_cc.block.yml b/grc/satnogs_coarse_doppler_correction_cc.block.yml
index 6ce7a69..6b8c0d0 100644
--- a/grc/satnogs_coarse_doppler_correction_cc.block.yml
+++ b/grc/satnogs_coarse_doppler_correction_cc.block.yml
@@ -12,6 +12,9 @@ parameters:
   default: samp_rate
 
 inputs:
+- id: freq
+  domain: message
+
 - label: in
   domain: stream
   dtype: complex