diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 6f96ed7b9775..9f738c642268 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -213,7 +213,7 @@ static int navi10_get_smu_msg_index(struct smu_context *smc, uint32_t index)
 {
 	struct smu_11_0_cmn2aisc_mapping mapping;
 
-	if (index > SMU_MSG_MAX_COUNT)
+	if (index >= SMU_MSG_MAX_COUNT)
 		return -EINVAL;
 
 	mapping = navi10_message_map[index];