diff --git a/services/std_svc/psci/psci_common.c b/services/std_svc/psci/psci_common.c
index 87be843..23235d3 100644
--- a/services/std_svc/psci/psci_common.c
+++ b/services/std_svc/psci/psci_common.c
@@ -98,7 +98,7 @@
  * Simple routine to retrieve the maximum affinity level supported by the
  * platform and check that it makes sense.
  ******************************************************************************/
-int get_max_afflvl()
+int get_max_afflvl(void)
 {
 	int aff_lvl;