diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index c56009c3589d88a5fbd5f4f221070da388694465..7785afbd222d4ef1aa01901fee6ece2ee18e006f 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -246,7 +246,8 @@ struct ps_data {
 	/* yes, this looks ugly, but guarantees that we can later use
 	 * bitmap_empty :)
 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
-	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
+	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
+			__aligned(__alignof__(unsigned long));
 	struct sk_buff_head bc_buf;
 	atomic_t num_sta_ps; /* number of stations in PS mode */
 	int dtim_count;