diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 12a80fd..07c1611 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1051,6 +1051,7 @@
 	register_irq_proc(irq, desc);
 	new->dir = NULL;
 	register_handler_proc(irq, new);
+	free_cpumask_var(mask);
 
 	return 0;