  #include <iostream>
  #include <stdexcept>
  
+diff --git a/gr-fec/lib/polar_common.cc b/gr-fec/lib/polar_common.cc
+index 6df894766..1b2a13137 100644
+--- a/gr-fec/lib/polar_common.cc
++++ b/gr-fec/lib/polar_common.cc
+@@ -19,6 +19,7 @@
+ #include <gnuradio/blocks/pack_k_bits.h>
+ #include <gnuradio/blocks/unpack_k_bits.h>
+ 
++#include <algorithm>
+ #include <cmath>
+ #include <iostream>
+ #include <stdexcept>
 -- 
 2.20.1
 

wasn't needed earlier is a mystery.
---
 gnuradio-runtime/lib/io_signature.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gnuradio-runtime/lib/io_signature.cc b/gnuradio-runtime/lib/io_signature.cc
index e5fd2bdd7..b330e56c3 100644

From 9e491db7d493c72fb1dde47f4a5b240fe950656d Mon Sep 17 00:00:00 2001
From: Ryan Volz <ryan.volz@gmail.com>
Date: Tue, 15 Sep 2020 13:44:19 -0400
Subject: [PATCH] runtime: lib: Include missing <algorithm> header.
