diff --git a/lbrynet/extras/daemon/mime_types.py b/lbrynet/extras/daemon/mime_types.py
index 5af8c1eef..88aa7077f 100644
--- a/lbrynet/extras/daemon/mime_types.py
+++ b/lbrynet/extras/daemon/mime_types.py
@@ -155,6 +155,6 @@ types_map = {
 def guess_media_type(path):
     _, ext = os.path.splitext(path)
     return types_map.get(
-        ext,
+        ext.strip().lower(),
         'application/octet-stream' if not (ext and ext[1:].strip()) else f'application/x-ext-{ext[1:].strip().lower()}'
     )
diff --git a/tests/unit/lbrynet_daemon/test_mime_types.py b/tests/unit/lbrynet_daemon/test_mime_types.py
index 5d074e47e..52abe8852 100644
--- a/tests/unit/lbrynet_daemon/test_mime_types.py
+++ b/tests/unit/lbrynet_daemon/test_mime_types.py
@@ -5,9 +5,11 @@ from lbrynet.extras.daemon import mime_types
 class TestMimeTypes(unittest.TestCase):
     def test_mp4_video(self):
         self.assertEqual("video/mp4", mime_types.guess_media_type("test.mp4"))
+        self.assertEqual("video/mp4", mime_types.guess_media_type("test.MP4"))
 
     def test_x_ext_(self):
         self.assertEqual("application/x-ext-lbry", mime_types.guess_media_type("test.lbry"))
+        self.assertEqual("application/x-ext-lbry", mime_types.guess_media_type("test.LBRY"))
 
     def test_octet_stream(self):
         self.assertEqual("application/octet-stream", mime_types.guess_media_type("test."))