diff --git a/plat/rpi3/rpi3_pm.c b/plat/rpi3/rpi3_pm.c
index 3a077d3..4f586b5 100644
--- a/plat/rpi3/rpi3_pm.c
+++ b/plat/rpi3/rpi3_pm.c
@@ -140,7 +140,7 @@
  * being turned off earlier. The target_state encodes the low power state that
  * each level has woken up from.
  ******************************************************************************/
-void rpi3_pwr_domain_on_finish(const psci_power_state_t *target_state)
+static void rpi3_pwr_domain_on_finish(const psci_power_state_t *target_state)
 {
 	assert(target_state->pwr_domain_state[MPIDR_AFFLVL0] ==
 					PLAT_LOCAL_STATE_OFF);