diff --git a/django/contrib/staticfiles/storage.py b/django/contrib/staticfiles/storage.py
index e02fec8ec0..16d33fff4b 100644
--- a/django/contrib/staticfiles/storage.py
+++ b/django/contrib/staticfiles/storage.py
@@ -228,7 +228,7 @@ class CachedFilesMixin(object):
 
                 # ..to apply each replacement pattern to the content
                 if name in adjustable_paths:
-                    content = original_file.read()
+                    content = original_file.read().decode(settings.FILE_CHARSET)
                     converter = self.url_converter(name)
                     for patterns in self._patterns.values():
                         for pattern in patterns:
diff --git a/tests/regressiontests/staticfiles_tests/apps/test/static/test/nonascii.css b/tests/regressiontests/staticfiles_tests/apps/test/static/test/nonascii.css
new file mode 100644
index 0000000000..a5358f6ede
--- /dev/null
+++ b/tests/regressiontests/staticfiles_tests/apps/test/static/test/nonascii.css
@@ -0,0 +1,5 @@
+body {
+  background: url('window.png');
+}
+
+.snowman:before { content: "☃"; }
diff --git a/tests/regressiontests/staticfiles_tests/apps/test/static/test/window.png b/tests/regressiontests/staticfiles_tests/apps/test/static/test/window.png
new file mode 100644
index 0000000000..ba48325c0a
Binary files /dev/null and b/tests/regressiontests/staticfiles_tests/apps/test/static/test/window.png differ
diff --git a/tests/regressiontests/staticfiles_tests/tests.py b/tests/regressiontests/staticfiles_tests/tests.py
index 7678d7f100..91435a2c86 100644
--- a/tests/regressiontests/staticfiles_tests/tests.py
+++ b/tests/regressiontests/staticfiles_tests/tests.py
@@ -498,8 +498,9 @@ class TestCollectionCachedStorage(BaseCollectionTestCase,
         collectstatic_cmd = CollectstaticCommand()
         collectstatic_cmd.set_options(**collectstatic_args)
         stats = collectstatic_cmd.collect()
-        self.assertTrue(os.path.join('cached', 'css', 'window.css') in stats['post_processed'])
-        self.assertTrue(os.path.join('cached', 'css', 'img', 'window.png') in stats['unmodified'])
+        self.assertIn(os.path.join('cached', 'css', 'window.css'), stats['post_processed'])
+        self.assertIn(os.path.join('cached', 'css', 'img', 'window.png'), stats['unmodified'])
+        self.assertIn(os.path.join('test', 'nonascii.css'), stats['post_processed'])
 
     def test_cache_key_memcache_validation(self):
         """