diff --git a/wpa_supplicant/op_classes.c b/wpa_supplicant/op_classes.c
index f49bdb094..983801faa 100644
--- a/wpa_supplicant/op_classes.c
+++ b/wpa_supplicant/op_classes.c
@@ -14,6 +14,7 @@
 #include "utils/common.h"
 #include "common/ieee802_11_common.h"
 #include "wpa_supplicant_i.h"
+#include "bss.h"
 
 
 static enum chan_allowed allow_channel(struct hostapd_hw_modes *mode,
@@ -356,9 +357,25 @@ static int wpas_op_class_supported(struct wpa_supplicant *wpa_s,
 }
 
 
+static int wpas_sta_secondary_channel_offset(struct wpa_bss *bss, u8 *current,
+					     u8 *channel)
+{
+
+	u8 *ies, phy_type;
+	size_t ies_len;
+
+	if (!bss)
+		return -1;
+	ies = (u8 *) (bss + 1);
+	ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
+	return wpas_get_op_chan_phy(bss->freq, ies, ies_len, current,
+				    channel, &phy_type);
+}
+
+
 size_t wpas_supp_op_class_ie(struct wpa_supplicant *wpa_s,
 			     struct wpa_ssid *ssid,
-			     int freq, u8 *pos, size_t len)
+			     struct wpa_bss *bss, u8 *pos, size_t len)
 {
 	struct wpabuf *buf;
 	u8 op, current, chan;
@@ -366,11 +383,13 @@ size_t wpas_supp_op_class_ie(struct wpa_supplicant *wpa_s,
 	size_t res;
 
 	/*
-	 * Assume 20 MHz channel for now.
-	 * TODO: Use the secondary channel and VHT channel width that will be
-	 * used after association.
+	 * Determine the current operating class correct mode based on
+	 * advertised BSS capabilities, if available. Fall back to a less
+	 * accurate guess based on frequency if the needed IEs are not available
+	 * or used.
 	 */
-	if (ieee80211_freq_to_channel_ext(freq, 0, CHANWIDTH_USE_HT,
+	if (wpas_sta_secondary_channel_offset(bss, &current, &chan) < 0 &&
+	    ieee80211_freq_to_channel_ext(bss->freq, 0, CHANWIDTH_USE_HT,
 					  &current, &chan) == NUM_HOSTAPD_MODES)
 		return 0;
 
diff --git a/wpa_supplicant/rrm.c b/wpa_supplicant/rrm.c
index 66855b877..afc117275 100644
--- a/wpa_supplicant/rrm.c
+++ b/wpa_supplicant/rrm.c
@@ -695,8 +695,8 @@ static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
 }
 
 
-static int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
-				u8 *op_class, u8 *chan, u8 *phy_type)
+int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
+			 u8 *op_class, u8 *chan, u8 *phy_type)
 {
 	const u8 *ie;
 	int sec_chan = 0, vht = 0;
diff --git a/wpa_supplicant/sme.c b/wpa_supplicant/sme.c
index aa59f151a..d4c12d1e3 100644
--- a/wpa_supplicant/sme.c
+++ b/wpa_supplicant/sme.c
@@ -578,7 +578,7 @@ static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 	sme_auth_handle_rrm(wpa_s, bss);
 
 	wpa_s->sme.assoc_req_ie_len += wpas_supp_op_class_ie(
-		wpa_s, ssid, bss->freq,
+		wpa_s, ssid, bss,
 		wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
 		sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len);
 
diff --git a/wpa_supplicant/wpa_supplicant.c b/wpa_supplicant/wpa_supplicant.c
index ba8ae65ae..584ca3b91 100644
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -2890,7 +2890,7 @@ static u8 * wpas_populate_assoc_ies(
 #endif /* CONFIG_P2P */
 
 	if (bss) {
-		wpa_ie_len += wpas_supp_op_class_ie(wpa_s, ssid, bss->freq,
+		wpa_ie_len += wpas_supp_op_class_ie(wpa_s, ssid, bss,
 						    wpa_ie + wpa_ie_len,
 						    max_wpa_ie_len -
 						    wpa_ie_len);
diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index eac7cad2d..383bf8e69 100644
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -1394,6 +1394,8 @@ int wpas_update_random_addr(struct wpa_supplicant *wpa_s, int style);
 int wpas_update_random_addr_disassoc(struct wpa_supplicant *wpa_s);
 void add_freq(int *freqs, int *num_freqs, int freq);
 
+int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
+			 u8 *op_class, u8 *chan, u8 *phy_type);
 void wpas_rrm_reset(struct wpa_supplicant *wpa_s);
 void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
 				   const u8 *report, size_t report_len);
@@ -1453,7 +1455,7 @@ enum chan_allowed verify_channel(struct hostapd_hw_modes *mode, u8 op_class,
 				 u8 channel, u8 bw);
 size_t wpas_supp_op_class_ie(struct wpa_supplicant *wpa_s,
 			     struct wpa_ssid *ssid,
-			     int freq, u8 *pos, size_t len);
+			     struct wpa_bss *bss, u8 *pos, size_t len);
 int * wpas_supp_op_classes(struct wpa_supplicant *wpa_s);
 
 int wpas_enable_mac_addr_randomization(struct wpa_supplicant *wpa_s,