diff --git a/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c b/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c
index 052bc88cf33c..45214a364baa 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c
@@ -2142,7 +2142,7 @@ static int polaris10_program_mem_timing_parameters(struct pp_hwmgr *hwmgr)
 	return 0;
 }
 
-int polaris10_thermal_avfs_enable(struct pp_hwmgr *hwmgr)
+static int polaris10_thermal_avfs_enable(struct pp_hwmgr *hwmgr)
 {
 	struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);