diff --git a/scheds/rust/scx_fair/src/bpf/main.bpf.c b/scheds/rust/scx_fair/src/bpf/main.bpf.c
index 9bc837048..dcf8e9d55 100644
--- a/scheds/rust/scx_fair/src/bpf/main.bpf.c
+++ b/scheds/rust/scx_fair/src/bpf/main.bpf.c
@@ -140,14 +140,6 @@ struct task_ctx *try_lookup_task_ctx(const struct task_struct *p)
 					(struct task_struct *)p, 0, 0);
 }
 
-/*
- * Access a cpumask in read-only mode (typically to check bits).
- */
-static const struct cpumask *cast_mask(struct bpf_cpumask *mask)
-{
-	return (const struct cpumask *)mask;
-}
-
 /*
  * Allocate/re-allocate a new cpumask.
  */