diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index 37308dbcc..0e86f10e0 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -1237,6 +1237,8 @@ static int hostapd_config_ht_capab(struct hostapd_config *conf,
 		conf->ht_capab |= HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
 		conf->ht40_plus_minus_allowed = 1;
 	}
+	if (!os_strstr(capab, "[HT40+]") && !os_strstr(capab, "[HT40-]"))
+		conf->secondary_channel = 0;
 	if (os_strstr(capab, "[SMPS-STATIC]")) {
 		conf->ht_capab &= ~HT_CAP_INFO_SMPS_MASK;
 		conf->ht_capab |= HT_CAP_INFO_SMPS_STATIC;