diff --git a/compressor/filters/css_default.py b/compressor/filters/css_default.py
index 8a05f87..efbb138 100644
--- a/compressor/filters/css_default.py
+++ b/compressor/filters/css_default.py
@@ -9,6 +9,7 @@ from compressor.filters import FilterBase, FilterError
 from compressor.utils import staticfiles
 
 URL_PATTERN = re.compile(r'url\(([^\)]+)\)')
+SRC_PATTERN = re.compile(r'src=([\'"])(.+?)\1')
 
 
 class CssAbsoluteFilter(FilterBase):
@@ -36,7 +37,8 @@ class CssAbsoluteFilter(FilterBase):
             self.protocol = '%s/' % '/'.join(parts[:2])
             self.host = parts[2]
         self.directory_name = '/'.join((self.url, os.path.dirname(self.path)))
-        return URL_PATTERN.sub(self.url_converter, self.content)
+        return SRC_PATTERN.sub(self.src_converter,
+            URL_PATTERN.sub(self.url_converter, self.content))
 
     def find(self, basename):
         if settings.DEBUG and basename and staticfiles.finders:
@@ -86,3 +88,13 @@ class CssAbsoluteFilter(FilterBase):
         if self.has_scheme:
             full_url = "%s%s" % (self.protocol, full_url)
         return "url('%s')" % self.add_suffix(full_url)
+
+    def src_converter(self, matchobj):
+        url = matchobj.group(2)
+        url = url.strip(' \'"')
+        if url.startswith(('http://', 'https://', '/', 'data:')):
+            return "src='%s'" % self.add_suffix(url)
+        full_url = posixpath.normpath('/'.join([str(self.directory_name), url]))
+        if self.has_scheme:
+            full_url = "%s%s" % (self.protocol, full_url)
+        return "src='%s'" % self.add_suffix(full_url)
diff --git a/compressor/tests/filters.py b/compressor/tests/filters.py
index df5f207..86ac67c 100644
--- a/compressor/tests/filters.py
+++ b/compressor/tests/filters.py
@@ -85,7 +85,8 @@ class CssMinTestCase(TestCase):
 class CssAbsolutizingTestCase(TestCase):
     hashing_method = 'mtime'
     hashing_func = staticmethod(get_hashed_mtime)
-    content = "p { background: url('../../img/python.png') }"
+    content = ("p { background: url('../../img/python.png') }"
+               "p { filter: Alpha(src='../../img/python.png') }")
 
     def setUp(self):
         self.old_enabled = settings.COMPRESS_ENABLED
@@ -108,36 +109,54 @@ class CssAbsolutizingTestCase(TestCase):
     def test_css_absolute_filter(self):
         filename = os.path.join(settings.COMPRESS_ROOT, 'css/url/test.css')
         imagefilename = os.path.join(settings.COMPRESS_ROOT, 'img/python.png')
-        output = "p { background: url('%simg/python.png?%s') }" % (settings.COMPRESS_URL, self.hashing_func(imagefilename))
+        params = {
+            'url': settings.COMPRESS_URL,
+            'hash': self.hashing_func(imagefilename),
+        }
+        output = ("p { background: url('%(url)simg/python.png?%(hash)s') }"
+                  "p { filter: Alpha(src='%(url)simg/python.png?%(hash)s') }") % params
         filter = CssAbsoluteFilter(self.content)
         self.assertEqual(output, filter.input(filename=filename, basename='css/url/test.css'))
-        settings.COMPRESS_URL = 'http://media.example.com/'
+        settings.COMPRESS_URL = params['url'] = 'http://media.example.com/'
         filter = CssAbsoluteFilter(self.content)
         filename = os.path.join(settings.COMPRESS_ROOT, 'css/url/test.css')
-        output = "p { background: url('%simg/python.png?%s') }" % (settings.COMPRESS_URL, self.hashing_func(imagefilename))
+        output = ("p { background: url('%(url)simg/python.png?%(hash)s') }"
+                  "p { filter: Alpha(src='%(url)simg/python.png?%(hash)s') }") % params
         self.assertEqual(output, filter.input(filename=filename, basename='css/url/test.css'))
 
     def test_css_absolute_filter_https(self):
         filename = os.path.join(settings.COMPRESS_ROOT, 'css/url/test.css')
         imagefilename = os.path.join(settings.COMPRESS_ROOT, 'img/python.png')
-        output = "p { background: url('%simg/python.png?%s') }" % (settings.COMPRESS_URL, self.hashing_func(imagefilename))
+        params = {
+            'url': settings.COMPRESS_URL,
+            'hash': self.hashing_func(imagefilename),
+        }
+        output = ("p { background: url('%(url)simg/python.png?%(hash)s') }"
+                  "p { filter: Alpha(src='%(url)simg/python.png?%(hash)s') }") % params
         filter = CssAbsoluteFilter(self.content)
         self.assertEqual(output, filter.input(filename=filename, basename='css/url/test.css'))
-        settings.COMPRESS_URL = 'https://media.example.com/'
+        settings.COMPRESS_URL = params['url'] = 'https://media.example.com/'
         filter = CssAbsoluteFilter(self.content)
         filename = os.path.join(settings.COMPRESS_ROOT, 'css/url/test.css')
-        output = "p { background: url('%simg/python.png?%s') }" % (settings.COMPRESS_URL, self.hashing_func(imagefilename))
+        output = ("p { background: url('%(url)simg/python.png?%(hash)s') }"
+                  "p { filter: Alpha(src='%(url)simg/python.png?%(hash)s') }") % params
         self.assertEqual(output, filter.input(filename=filename, basename='css/url/test.css'))
 
     def test_css_absolute_filter_relative_path(self):
         filename = os.path.join(settings.TEST_DIR, 'whatever', '..', 'media', 'whatever/../css/url/test.css')
         imagefilename = os.path.join(settings.COMPRESS_ROOT, 'img/python.png')
-        output = "p { background: url('%simg/python.png?%s') }" % (settings.COMPRESS_URL, self.hashing_func(imagefilename))
+        params = {
+            'url': settings.COMPRESS_URL,
+            'hash': self.hashing_func(imagefilename),
+        }
+        output = ("p { background: url('%(url)simg/python.png?%(hash)s') }"
+                  "p { filter: Alpha(src='%(url)simg/python.png?%(hash)s') }") % params
         filter = CssAbsoluteFilter(self.content)
         self.assertEqual(output, filter.input(filename=filename, basename='css/url/test.css'))
-        settings.COMPRESS_URL = 'https://media.example.com/'
+        settings.COMPRESS_URL = params['url'] = 'https://media.example.com/'
         filter = CssAbsoluteFilter(self.content)
-        output = "p { background: url('%simg/python.png?%s') }" % (settings.COMPRESS_URL, self.hashing_func(imagefilename))
+        output = ("p { background: url('%(url)simg/python.png?%(hash)s') }"
+                  "p { filter: Alpha(src='%(url)simg/python.png?%(hash)s') }") % params
         self.assertEqual(output, filter.input(filename=filename, basename='css/url/test.css'))
 
     def test_css_hunks(self):
@@ -150,12 +169,14 @@ p { background: url('/media/img/python.png?%(hash1)s'); }
 p { background: url('/media/img/python.png?%(hash1)s'); }
 p { background: url('/media/img/python.png?%(hash1)s'); }
 p { background: url('/media/img/python.png?%(hash1)s'); }
+p { filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/media/img/python.png?%(hash1)s'); }
 """ % hash_dict,
                u"""\
 p { background: url('/media/img/add.png?%(hash2)s'); }
 p { background: url('/media/img/add.png?%(hash2)s'); }
 p { background: url('/media/img/add.png?%(hash2)s'); }
 p { background: url('/media/img/add.png?%(hash2)s'); }
+p { filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/media/img/add.png?%(hash2)s'); }
 """ % hash_dict], list(self.css_node.hunks()))
 
     def test_guess_filename(self):
diff --git a/compressor/tests/media/css/url/2/url2.css b/compressor/tests/media/css/url/2/url2.css
index 48e20a5..45686ca 100644
--- a/compressor/tests/media/css/url/2/url2.css
+++ b/compressor/tests/media/css/url/2/url2.css
@@ -2,3 +2,4 @@ p { background: url('../../../img/add.png'); }
 p { background: url(../../../img/add.png); }
 p { background: url( ../../../img/add.png ); }
 p { background: url( '../../../img/add.png' ); }
+p { filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../../../img/add.png'); }
diff --git a/compressor/tests/media/css/url/url1.css b/compressor/tests/media/css/url/url1.css
index e77e922..609c111 100644
--- a/compressor/tests/media/css/url/url1.css
+++ b/compressor/tests/media/css/url/url1.css
@@ -2,3 +2,4 @@ p { background: url('../../img/python.png'); }
 p { background: url(../../img/python.png); }
 p { background: url( ../../img/python.png ); }
 p { background: url( '../../img/python.png' ); }
+p { filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../../img/python.png'); }