diff --git a/lib/marcel/mime_type/definitions.rb b/lib/marcel/mime_type/definitions.rb
index 09ce72b..7f877fe 100644
--- a/lib/marcel/mime_type/definitions.rb
+++ b/lib/marcel/mime_type/definitions.rb
@@ -70,3 +70,17 @@
 )
 
 Marcel::MimeType.extend "text/markdown", extensions: %w(md mdtext markdown mkd), parents: "text/x-web-markdown"
+
+Marcel::MimeType.extend "application/x-bzip2", 
+  magic: [
+    [0, "BZh1"],
+    [0, "BZh2"], 
+    [0, "BZh3"],
+    [0, "BZh4"],
+    [0, "BZh5"],
+    [0, "BZh6"],
+    [0, "BZh7"],
+    [0, "BZh8"],
+    [0, "BZh9"]
+  ],
+  extensions: %w( bz2 boz tbz2 )
diff --git a/test/fixtures/magic/application/x-bzip2/bzip2.bz2 b/test/fixtures/magic/application/x-bzip2/bzip2.bz2
new file mode 100644
index 0000000..b56f3b9
Binary files /dev/null and b/test/fixtures/magic/application/x-bzip2/bzip2.bz2 differ