diff --git a/swig/grgsm_swig.i b/swig/grgsm_swig.i
index 81a5942..a6baf97 100644
--- a/swig/grgsm_swig.i
+++ b/swig/grgsm_swig.i
@@ -106,3 +106,4 @@
 GR_SWIG_BLOCK_MAGIC2(gsm, message_sink);
 %include "grgsm/msg_to_tag.h"
 GR_SWIG_BLOCK_MAGIC2(grgsm, msg_to_tag);
+GR_SWIG_BLOCK_MAGIC2(gsm, controlled_fractional_resampler_cc);