diff --git a/lib/svgo/svg2js.js b/lib/svgo/svg2js.js
index b9709a069..9b0746028 100644
--- a/lib/svgo/svg2js.js
+++ b/lib/svgo/svg2js.js
@@ -1,7 +1,8 @@
 'use strict';
 
 var SAX = require('sax'),
-    JSAPI = require('./jsAPI');
+    JSAPI = require('./jsAPI'),
+    entityDeclaration = /<!ENTITY\s+(\S+)\s+(?:'([^\']+)'|"([^\"]+)")\s*>/g;
 
 var config = {
     strict: true,
@@ -42,6 +43,16 @@ module.exports = function(data, callback) {
             doctype: doctype
         });
 
+        var subsetStart = doctype.indexOf('['),
+            entityMatch;
+
+        if (subsetStart >= 0) {
+            entityDeclaration.lastIndex = subsetStart;
+
+            while ((entityMatch = entityDeclaration.exec(data)) != null) {
+                sax.ENTITIES[entityMatch[1]] = entityMatch[2] || entityMatch[3];
+            }
+        }
     };
 
     sax.onprocessinginstruction = function(data) {
diff --git a/test/svg2js/_index.js b/test/svg2js/_index.js
index d88a16f30..fcc88a9c5 100644
--- a/test/svg2js/_index.js
+++ b/test/svg2js/_index.js
@@ -449,4 +449,33 @@ describe('svg2js', function() {
 
     });
 
+    describe('entities', function() {
+        var filepath = PATH.resolve(__dirname, './test.entities.svg'),
+            root;
+
+        before(function(done) {
+            FS.readFile(filepath, 'utf8', function(err, data) {
+                if (err) throw err;
+
+                SVG2JS(data, function(result) {
+                    root = result;
+                });
+                done();
+            });
+        });
+
+        describe('root', function() {
+            it('should exist', function() {
+                return root.should.exist;
+            });
+
+            it('should have correctly parsed entities', function() {
+                var attrs = root.content[root.content.length - 1].attrs;
+
+                attrs['xmlns:x'].value.should.be.equal('http://ns.adobe.com/Extensibility/1.0/');
+                attrs['xmlns:graph'].value.should.be.equal('http://ns.adobe.com/Graphs/1.0/');
+            });
+        });
+    });
+
 });
diff --git a/test/svg2js/test.entities.svg b/test/svg2js/test.entities.svg
new file mode 100644
index 000000000..03e4d43c0
--- /dev/null
+++ b/test/svg2js/test.entities.svg
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" [
+<!ENTITY ns_extend "http://ns.adobe.com/Extensibility/1.0/">
+<!ENTITY ns_ai "http://ns.adobe.com/AdobeIllustrator/10.0/">
+<!ENTITY ns_graphs "http://ns.adobe.com/Graphs/1.0/">
+]>
+<svg xmlns:x="&ns_extend;" xmlns:i="&ns_ai;" xmlns:graph="&ns_graphs;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" x="0px" y="0px" width="583.029px" height="45px" viewBox="0 0 583.029 45" enable-background="new 0 0 583.029 45" xml:space="preserve"></svg>
\ No newline at end of file