diff -Naur gr-iqbal.orig/lib/fix_cc.cc gr-iqbal/lib/fix_cc.cc
--- gr-iqbal.orig/lib/fix_cc.cc	2020-08-06 14:02:09.000000000 +0300
+++ gr-iqbal/lib/fix_cc.cc	2020-08-06 14:42:45.125835749 +0300
@@ -43,7 +43,7 @@
 {
 	message_port_register_in(pmt::mp("iqbal_corr"));
 	set_msg_handler(pmt::mp("iqbal_corr"),
-			boost::bind(&iqbalance::fix_cc::apply_new_corrections, this, _1));
+			boost::bind(&iqbalance::fix_cc::apply_new_corrections, this,  boost::placeholders::_1));
 }