diff --git a/lib/psci/psci_off.c b/lib/psci/psci_off.c
index e8cd8fe..5447045 100644
--- a/lib/psci/psci_off.c
+++ b/lib/psci/psci_off.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -43,7 +43,7 @@
 int psci_do_cpu_off(unsigned int end_pwrlvl)
 {
 	int rc = PSCI_E_SUCCESS;
-	int idx = (int) plat_my_core_pos();
+	unsigned int idx = plat_my_core_pos();
 	psci_power_state_t state_info;
 	unsigned int parent_nodes[PLAT_MAX_PWR_LVL] = {0};