diff --git a/src/codegen.inc.php b/src/codegen.inc.php
index ad34706..2e5e440 100644
--- a/src/codegen.inc.php
+++ b/src/codegen.inc.php
@@ -80,4 +80,59 @@ function _add_twig_support(\Twig\Environment $twig)
         return $v;
     }
   ));
+  $twig->addFilter(new \Twig\TwigFilter('go_type', 
+    function($type, $tokens) 
+    {
+      return go_type($type, $tokens);
+    }
+  ));
+  $twig->addFilter(new \Twig\TwigFilter('ucfirst', 
+    function($str) 
+    {
+      return ucfirst($str);
+    }
+  ));
 }
+
+function go_type(\mtgType $type, array $tokens = array())
+{
+  if($type instanceof \mtgArrType)
+  {
+    $vtype = $type->getValue();
+
+    $native = go_type($vtype);
+
+    $str = "[]";
+    if(array_key_exists("virtual", $tokens))
+      $str .= "I";
+    else
+      $str .= $vtype instanceof mtgMetaStruct ? "*" : "";
+
+    $str .= $native;
+
+    return $str;
+  }
+  else if($type instanceof \mtgBuiltinType)
+  {
+    if($type->isFloat())
+      return "float32";
+    else if($type->isDouble())
+      return "float64";
+    else if($type->isBlob())
+      return "[]byte";
+    else
+      return $type->getName();
+  }
+  else if($type instanceof \mtgMetaEnum)
+    return $type->getName();
+  else if($type instanceof \mtgMetaStruct)
+  {
+    if(array_key_exists("virtual", $tokens))
+      return "I{$type->getName()}";
+    else
+      return $type->getName();
+  }
+  else
+    throw new Exception("Unknown type '$type'");
+}
+
diff --git a/tpl/macro.twig b/tpl/macro.twig
index 0c2ac66..125a4ab 100644
--- a/tpl/macro.twig
+++ b/tpl/macro.twig
@@ -17,7 +17,8 @@ type {{o.name}} struct {
 {% if o.parent %}
 {{o.parent.name}}
 {% endif %}
-  %fields%
+
+{{_self.decl_struct_fields(o)}}
 }
 var _{{o.name}}_class_props map[string]string
 var _{{o.name}}_class_fields []string = %fields_names%
@@ -87,6 +88,12 @@ func (self *{{o.name}}) WriteFields(writer meta.Writer) error {
 
 {% endmacro %}
 
+{% macro decl_struct_fields(o) %}
+{%- for f in o.fields ~%}
+{{f.name|ucfirst}} {{f.type|go_type(f.tokens)}} {{f.name|first != '_' ? '`json:"' ~ f.name ~ '"`'}} 
+{%- endfor ~%}
+{% endmacro %}
+
 {% macro decl_enum(o) %}
 
 //==============================