--- Libtmp/GSL/SF/poly/gsl_sf_poly.pd.orig	2022-02-14 02:02:23.000000000 -0800
+++ Libtmp/GSL/SF/poly/gsl_sf_poly.pd	2022-05-06 13:49:30.000000000 -0700
@@ -24,6 +24,7 @@
 pp_addhdr('
 
 #include <gsl/gsl_poly.h>
+#include <gsl/gsl_errno.h>
 
 #include "../../gslerr.h"