diff --git a/hyde/ext/plugins/images.py b/hyde/ext/plugins/images.py
index fd7fe4d..dd0ba48 100644
--- a/hyde/ext/plugins/images.py
+++ b/hyde/ext/plugins/images.py
@@ -28,10 +28,14 @@ class ImageSizerPlugin(Plugin):
             self.logger.warn("[%s] has an img tag without src attribute" % resource)
             return ""           # Nothing
         if src not in self.cache:
-            if not re.match(r"(/[^/]|[^/]).*", src):
+            if src.startswith(self.site.config.media_url):
+                path = src[len(self.site.config.media_url):].lstrip("/")
+                path = self.site.config.media_root_path.child(path)
+                image = self.site.content.resource_from_relative_deploy_path(path)
+            elif re.match(r'([a-z]+://|//).*', src):
                 # Not a local link
                 return ""       # Nothing
-            if src.startswith("/"):
+            elif src.startswith("/"):
                 # Absolute resource
                 path = src.lstrip("/")
                 image = self.site.content.resource_from_relative_deploy_path(path)
diff --git a/hyde/tests/ext/test_images.py b/hyde/tests/ext/test_images.py
index 79fcdbd..5724f23 100644
--- a/hyde/tests/ext/test_images.py
+++ b/hyde/tests/ext/test_images.py
@@ -29,19 +29,19 @@ class TestImageSizer(object):
         IMAGES = TEST_SITE.child_folder('content/media/img')
         IMAGES.make()
         IMAGE_SOURCE.copy_contents_to(IMAGES)
+        self.site = Site(TEST_SITE)
 
     def tearDown(self):
         TEST_SITE.delete()
 
     def _generic_test_image(self, text):
-        site = Site(TEST_SITE)
-        site.config.mode = "production"
-        site.config.plugins = ['hyde.ext.plugins.images.ImageSizerPlugin']
-        tlink = File(site.content.source_folder.child('timg.html'))
+        self.site.config.mode = "production"
+        self.site.config.plugins = ['hyde.ext.plugins.images.ImageSizerPlugin']
+        tlink = File(self.site.content.source_folder.child('timg.html'))
         tlink.write(text)
-        gen = Generator(site)
+        gen = Generator(self.site)
         gen.generate_all()
-        f = File(site.config.deploy_root_path.child(tlink.name))
+        f = File(self.site.config.deploy_root_path.child(tlink.name))
         assert f.exists
         html = f.read_all()
         assert html
@@ -121,6 +121,15 @@ src="/media/img/%s">
     def test_size_malformed2(self):
         text = u"""
 <img src="/media/img/%s alt="hello">
+""" % IMAGE_NAME
+        html = self._generic_test_image(text)
+        assert ' width="%d"' % IMAGE_SIZE[0] in html
+        assert ' height="%d"' % IMAGE_SIZE[1] in html
+
+    def test_outside_media_url(self):
+        self.site.config.media_url = "http://media.example.com/"
+        text = u"""
+<img src="http://media.example.com/img/%s" alt="hello">
 """ % IMAGE_NAME
         html = self._generic_test_image(text)
         assert ' width="%d"' % IMAGE_SIZE[0] in html