diff --git a/mac80211.c b/mac80211.c
index 8bb1c7ab..148e126b 100644
--- a/mac80211.c
+++ b/mac80211.c
@@ -180,7 +180,7 @@ static const struct cfg80211_sar_freq_ranges mt76_sar_freq_ranges[] = {
 	{ .start_freq = 5725, .end_freq = 5950, },
 };
 
-const struct cfg80211_sar_capa mt76_sar_capa = {
+static const struct cfg80211_sar_capa mt76_sar_capa = {
 	.type = NL80211_SAR_TYPE_POWER,
 	.num_freq_ranges = ARRAY_SIZE(mt76_sar_freq_ranges),
 	.freq_ranges = &mt76_sar_freq_ranges[0],