diff --git a/arch/arm64/kernel/mpam/mpam_setup.c b/arch/arm64/kernel/mpam/mpam_setup.c
index d30910e0cda2db2b3fbd578117b6517abfa056c5..6e71c99d19b0535ebf513901d410ac7da8ed88b7 100644
--- a/arch/arm64/kernel/mpam/mpam_setup.c
+++ b/arch/arm64/kernel/mpam/mpam_setup.c
@@ -172,6 +172,8 @@ int mpam_resctrl_cpu_offline(unsigned int cpu)
 		list_del(&d->list);
 		dom = container_of(d, struct mpam_resctrl_dom, resctrl_dom);
 		kfree(dom);
+
+		res->resctrl_res.dom_num--;
 	}
 
 	mpam_resctrl_clear_default_cpu(cpu);