diff --git a/epan/dissectors/packet-ieee80211-radio.c b/epan/dissectors/packet-ieee80211-radio.c
index 3f11c74783..fec3deaa3c 100644
--- a/epan/dissectors/packet-ieee80211-radio.c
+++ b/epan/dissectors/packet-ieee80211-radio.c
@@ -439,7 +439,7 @@ dissect_wlan_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void
             bandwidth_40 =
               (info_n->bandwidth == PHDR_802_11_BANDWIDTH_40_MHZ) ?
                1 : 0;
-            if (info_n->mcs_index < MAX_MCS_INDEX) {
+            if (info_n->mcs_index <= MAX_MCS_INDEX) {
               data_rate = ieee80211_htrate(info_n->mcs_index, bandwidth_40, info_n->short_gi);
               have_data_rate = TRUE;
             }