diff --git a/services/std_svc/psci/psci_common.c b/services/std_svc/psci/psci_common.c
index 465c5fd..8a2b81c 100644
--- a/services/std_svc/psci/psci_common.c
+++ b/services/std_svc/psci/psci_common.c
@@ -393,6 +393,7 @@
 	unsigned int start_idx, ncpus;
 	plat_local_state_t target_state, *req_states;
 
+	assert(end_pwrlvl <= PLAT_MAX_PWR_LVL);
 	parent_idx = psci_cpu_pd_nodes[cpu_idx].parent_node;
 
 	/* For level 0, the requested state will be equivalent