diff --git a/lib/carto/renderer.js b/lib/carto/renderer.js
index 07dd281..fd9eea5 100644
--- a/lib/carto/renderer.js
+++ b/lib/carto/renderer.js
@@ -47,7 +47,7 @@ carto.Renderer.prototype.renderMSS = function render(data, callback) {
     if (env.benchmark) console.time('Total Style generation');
     for (var k = 0, rule, style_name; k < sorted.length; k++) {
         rule = sorted[k];
-        style_name = 'style-' + (rule.attachment !== '__default__' ? '-' + rule.attachment : '');
+        style_name = 'style' + (rule.attachment !== '__default__' ? '-' + rule.attachment : '');
         styles.push(style_name);
         var bench_name = '\tStyle "'+style_name+'" (#'+k+') toXML';
         if (env.benchmark) console.time(bench_name);
diff --git a/lib/carto/tree/definition.js b/lib/carto/tree/definition.js
index 9f3c2bf..39b79ac 100644
--- a/lib/carto/tree/definition.js
+++ b/lib/carto/tree/definition.js
@@ -81,8 +81,7 @@ function symbolizerList(sym_order) {
 }
 
 tree.Definition.prototype.symbolizersToXML = function(env, symbolizers, zoom) {
-    var xml = '  <Rule>\n' + zoom.toXML(env).join('') +
-        this.filters.toXML(env);
+    var xml = zoom.toXML(env).join('') + this.filters.toXML(env);
 
     // Sort symbolizers by the index of their first property definition
     var sym_order = [], indexes = [];
@@ -143,8 +142,8 @@ tree.Definition.prototype.symbolizersToXML = function(env, symbolizers, zoom) {
             }
         }
     }
-    xml += '  </Rule>\n';
-    return xml;
+    if (!xml) return '';
+    return '  <Rule>\n' + xml + '  </Rule>\n';
 };
 
 // Take a zoom range of zooms and 'i', the index of a rule in this.rules,
diff --git a/lib/carto/tree/style.js b/lib/carto/tree/style.js
index 3d90357..6a58fbf 100644
--- a/lib/carto/tree/style.js
+++ b/lib/carto/tree/style.js
@@ -38,8 +38,9 @@ tree.Style.toXML = function(name, attachment, definitions, env) {
     if (opacity.length) {
         attrs_xml += ' opacity="' + opacity[0].value.eval(env).toString() + '" ';
     }
-
-    return '<Style name="' + name + '" filter-mode="first" ' + attrs_xml + '>\n' + rules.join('') + '</Style>';
+    var rule_string = rules.join('');
+    if (!attrs_xml && !rule_string) return '';
+    return '<Style name="' + name + '" filter-mode="first" ' + attrs_xml + '>\n' + rule_string + '</Style>';
 };
 
 })(require('../tree'));
\ No newline at end of file
diff --git a/test/rendering-mss.test.js b/test/rendering-mss.test.js
index f7787f8..2d31a5d 100644
--- a/test/rendering-mss.test.js
+++ b/test/rendering-mss.test.js
@@ -7,7 +7,7 @@ var carto = require('../lib/carto');
 var tree = require('../lib/carto/tree');
 var helper = require('./support/helper');
 
-/*
+
 
 describe('Rendering mss', function() {
 helper.files('rendering-mss', 'mss', function(file) {
@@ -43,4 +43,3 @@ helper.files('rendering-mss', 'mss', function(file) {
 });
 });
 
-*/
\ No newline at end of file
diff --git a/test/rendering-mss/should-discard-empty-style-and-attach.xml b/test/rendering-mss/should-discard-empty-style-and-attach.xml
index e69de29..8b13789 100644
--- a/test/rendering-mss/should-discard-empty-style-and-attach.xml
+++ b/test/rendering-mss/should-discard-empty-style-and-attach.xml
@@ -0,0 +1 @@
+