diff --git a/mt7921/main.c b/mt7921/main.c
index e9f12dad..a6d9cc8b 100644
--- a/mt7921/main.c
+++ b/mt7921/main.c
@@ -12,7 +12,7 @@ static void
 mt7921_gen_ppe_thresh(u8 *he_ppet, int nss)
 {
 	u8 i, ppet_bits, ppet_size, ru_bit_mask = 0x7; /* HE80 */
-	u8 ppet16_ppet8_ru3_ru0[] = {0x1c, 0xc7, 0x71};
+	static const u8 ppet16_ppet8_ru3_ru0[] = {0x1c, 0xc7, 0x71};
 
 	he_ppet[0] = FIELD_PREP(IEEE80211_PPE_THRES_NSS_MASK, nss - 1) |
 		     FIELD_PREP(IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK,