diff --git a/files/etc/config.ap/_setup b/files/etc/config.ap/_setup
index 46b3eb3f..14ac2324 100644
--- a/files/etc/config.ap/_setup
+++ b/files/etc/config.ap/_setup
@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 
diff --git a/files/etc/config.ap/_setup.default b/files/etc/config.ap/_setup.default
index 46b3eb3f..14ac2324 100644
--- a/files/etc/config.ap/_setup.default
+++ b/files/etc/config.ap/_setup.default
@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 
diff --git a/files/etc/config.ap/wireless b/files/etc/config.ap/wireless
index 853802b6..ae29939f 100644
--- a/files/etc/config.ap/wireless
+++ b/files/etc/config.ap/wireless
@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
 	option distance	<wifi_distance>
 
 config wifi-iface
diff --git a/files/etc/config.mesh/_setup b/files/etc/config.mesh/_setup
index b2151d78..d098c8c3 100644
--- a/files/etc/config.mesh/_setup
+++ b/files/etc/config.mesh/_setup
@@ -5,6 +5,7 @@ wifi_ssid = BroadbandHamnet-v2
 wifi_mode = adhoc
 wifi_txpower = 19
 wifi_channel = 1
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_country = 00
 
diff --git a/files/etc/config.mesh/_setup.default b/files/etc/config.mesh/_setup.default
index 49cf423b..260ed687 100644
--- a/files/etc/config.mesh/_setup.default
+++ b/files/etc/config.mesh/_setup.default
@@ -5,6 +5,7 @@ wifi_ssid = BroadbandHamnet-v2
 wifi_mode = adhoc
 wifi_txpower = 19
 wifi_channel = 1
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_country = 00
 
diff --git a/files/etc/config.mesh/wireless b/files/etc/config.mesh/wireless
index 06125f20..91945f7f 100644
--- a/files/etc/config.mesh/wireless
+++ b/files/etc/config.mesh/wireless
@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
         option distance <wifi_distance>
         option country <wifi_country>
 
diff --git a/files/etc/config.mesh_ap/_setup b/files/etc/config.mesh_ap/_setup
index 10aa592c..ed461bc9 100644
--- a/files/etc/config.mesh_ap/_setup
+++ b/files/etc/config.mesh_ap/_setup
@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 
diff --git a/files/etc/config.mesh_ap/_setup.default b/files/etc/config.mesh_ap/_setup.default
index 10aa592c..ed461bc9 100644
--- a/files/etc/config.mesh_ap/_setup.default
+++ b/files/etc/config.mesh_ap/_setup.default
@@ -3,6 +3,7 @@ wifi_mode = ap
 wifi_ssid = <NODE>
 wifi_txpower = 19
 wifi_channel = 6
+wifi_chanbw = 20
 wifi_distance = 0
 wifi_hidden = 0
 
diff --git a/files/etc/config.mesh_ap/wireless b/files/etc/config.mesh_ap/wireless
index 853802b6..ae29939f 100644
--- a/files/etc/config.mesh_ap/wireless
+++ b/files/etc/config.mesh_ap/wireless
@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
 	option distance	<wifi_distance>
 
 config wifi-iface
diff --git a/files/etc/config.router/wireless b/files/etc/config.router/wireless
index bb43b0be..d64e39f7 100644
--- a/files/etc/config.router/wireless
+++ b/files/etc/config.router/wireless
@@ -2,6 +2,7 @@ config wifi-device  radio0
 	option type     mac80211
 	option phy	phy0
 	option channel  <wifi_channel>
+        option chanbw   <wifi_chanbw>
 	option disabled 1
 
 config wifi-iface
diff --git a/files/www/cgi-bin/channelmaps.pm b/files/www/cgi-bin/channelmaps.pm
index 9d568d7e..72c6dff0 100644
--- a/files/www/cgi-bin/channelmaps.pm
+++ b/files/www/cgi-bin/channelmaps.pm
@@ -139,6 +139,25 @@ sub rf_channels_list
     }
 }
 
+sub is_wifi_chanbw_valid
+{
+    my ($wifi_chanbw,$wifi_ssid) = @_;
+    my $boardinfo=hardware_info();
+    if ( ( exists($boardinfo->{'rfband'}) ) && ( $boardinfo->{'rfband'} == "2400" ) && ( $wifi_chanbw != 20 ) )
+    {
+        if ( (( length $wifi_ssid >= 33 ) || ( length $wifi_ssid == 0 )) || ( $wifi_ssid =~ /BroadBandHamnet-v.*/i ))
+        {
+            # 2.4ghz and default ssid not 20mhz wide -- Invalid chan_bw
+            return 0;
+        } else {
+            # chan_bw valid
+            return 1;
+        }
+    }
+    # Not 2.4ghz or device is unknown, trust the user submission.
+    return 1;
+}
+
 #weird uhttpd/busybox error requires a 1 at the end of this file
 1
 
diff --git a/files/www/cgi-bin/setup b/files/www/cgi-bin/setup
index c4799ad4..5065a8b3 100755
--- a/files/www/cgi-bin/setup
+++ b/files/www/cgi-bin/setup
@@ -179,6 +179,12 @@ if($parms{button_save})
         push (@errors, "invalid WiFi channel")
     }
 
+    if ( !is_wifi_chanbw_valid($wifi_chanbw,$wifi_ssid) )
+    {
+        push (@errors, "Invalid WiFi channel width");
+        $wifi_chanbw = 20;
+    }
+
     push (@errors, "invalid WiFi distance") if $wifi_distance < 0 or $wifi_distance =~ /\D/;
 
     $wifi_country_validated=0;
@@ -523,6 +529,15 @@ if($wifi_proto ne "disabled")
 	push @hidden, "<input type=hidden name=wifi_channel value='$wifi_channel'>";
     }
 
+    {
+        print "<tr><td>Channel Width</td>\n";
+        print "<td><select name=wifi_chanbw>\n";
+        selopt("20 MHz","20",$wifi_chanbw);
+        selopt("10 MHz","10",$wifi_chanbw);
+        selopt("5 MHz","5",$wifi_chanbw);
+        print "</select></td></tr>\n";
+    }
+
     if ($config ne "mesh")
     {
         print "<tr><td>Country</td>\n";