diff --git a/lib/NGCP/Panel/Utils/Preferences.pm b/lib/NGCP/Panel/Utils/Preferences.pm
index b0edd1cf6d..eb77cabcae 100644
--- a/lib/NGCP/Panel/Utils/Preferences.pm
+++ b/lib/NGCP/Panel/Utils/Preferences.pm
@@ -327,7 +327,7 @@ sub prepare_resource {
             $value = $pref->value;
         } # SWITCH
         eval {
-            $value = _api_transform_out($c, $pref->attribute, $pref->value);
+            $value = _api_transform_out($c, $pref->attribute, $value);
         };
         if ($@) {
             $c->log->error("Failed to transform pref value - $@");
@@ -1001,14 +1001,20 @@ sub _api_transform_out {
     if ($c->request and $c->request->path =~/^api\//i) {
         $API_TRANSFORM_OUT = _init_transform($API_TRANSFORM_OUT,$c->config->{preference_out_transformations});
         if (exists $API_TRANSFORM_OUT->{$meta->attribute}) {
-            if (defined $value and exists $API_TRANSFORM_OUT->{$meta->attribute}->{$value}) {
-                $value = $API_TRANSFORM_OUT->{$meta->attribute}->{$value};
-                if ('CODE' eq ref $value) {
-                    eval {
-                        $value = $value->($meta,$value);
-                    };
-                    if ($@) {
-                        die($meta->attribute . ": " . $@);
+            if (defined $value) {
+                my $v = $value;
+                if (JSON::is_bool($v)) {
+                    $v =  $v ? 1 : 0 ;
+                }
+                if (exists $API_TRANSFORM_OUT->{$meta->attribute}->{$v}) {
+                    $value = $API_TRANSFORM_OUT->{$meta->attribute}->{$v};
+                    if ('CODE' eq ref $value) {
+                        eval {
+                            $value = $value->($meta,$value);
+                        };
+                        if ($@) {
+                            die($meta->attribute . ": " . $@);
+                        }
                     }
                 }
             }