diff --git a/include/grgsm/flow_control/burst_fnr_filter.h b/include/grgsm/flow_control/burst_fnr_filter.h
index dd60830..0d94ff8 100644
--- a/include/grgsm/flow_control/burst_fnr_filter.h
+++ b/include/grgsm/flow_control/burst_fnr_filter.h
@@ -26,6 +26,7 @@
 
 #include <grgsm/api.h>
 #include <gnuradio/block.h>
+#include <grgsm/flow_control/common.h>
 
 namespace gr {
   namespace gsm {
@@ -62,6 +63,10 @@
 
       virtual filter_mode get_mode(void) = 0;
       virtual filter_mode set_mode(filter_mode mode) = 0;
+
+      /* Filtering policy */
+      virtual filter_policy get_policy(void) = 0;
+      virtual filter_policy set_policy(filter_policy policy) = 0;
     };
 
   } // namespace gsm