diff --git a/CHANGES.md b/CHANGES.md
index f8926ef0..c84e8084 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,9 @@
-### 0.11.10 (2016-03-17 19:00:00 UTC)
+### 0.11.11 (2016-04-05 19:20:00 UTC)
+
+* Add support for SD mkv container
+
+
+### 0.11.10 (2016-03-17 19:00:00 UTC)
 
 * Fix dbs that should not have been imported to work
 
diff --git a/sickbeard/common.py b/sickbeard/common.py
index c3b93237..d4a5c9cc 100644
--- a/sickbeard/common.py
+++ b/sickbeard/common.py
@@ -271,7 +271,7 @@ class Quality:
 
     @staticmethod
     def assumeQuality(name):
-        if name.lower().endswith(('.avi', '.mp4')):
+        if name.lower().endswith(('.avi', '.mp4', '.mkv')):
             return Quality.SDTV
         elif name.lower().endswith('.ts'):
             return Quality.RAWHDTV
diff --git a/tests/common_tests.py b/tests/common_tests.py
index b03e845c..82c32407 100644
--- a/tests/common_tests.py
+++ b/tests/common_tests.py
@@ -12,6 +12,9 @@ class QualityTests(unittest.TestCase):
     # TODO: repack / proper ? air-by-date ? season rip? multi-ep?
 
     def test_SDTV(self):
+        self.assertEqual(common.Quality.compositeStatus(common.DOWNLOADED, common.Quality.SDTV),
+                         common.Quality.statusFromName('Test.Show.S01E02-GROUP.mkv'))
+
         self.assertEqual(common.Quality.SDTV, common.Quality.nameQuality("Test.Show.S01E02.PDTV.XViD-GROUP"))
         self.assertEqual(common.Quality.SDTV, common.Quality.nameQuality("Test.Show.S01E02.PDTV.x264-GROUP"))
         self.assertEqual(common.Quality.SDTV, common.Quality.nameQuality("Test.Show.S01E02.HDTV.XViD-GROUP"))