diff --git a/lang/guile2/files/patch-libguile_posix.c b/lang/guile2/files/patch-libguile_posix.c
new file mode 100644
index 000000000000..adf781adf214
--- /dev/null
+++ b/lang/guile2/files/patch-libguile_posix.c
@@ -0,0 +1,10 @@
+--- libguile/posix.c.orig	2019-07-01 05:21:54.000000000 -0700
++++ libguile/posix.c	2021-11-23 12:10:16.007364000 -0800
+@@ -28,6 +28,7 @@
+ #include <uniconv.h>
+ 
+ #ifdef HAVE_SCHED_H
++#define _WITH_CPU_SET_T
+ # include <sched.h>
+ #endif
+