diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 809b735deb11048572781763538327d44fdb8175..93e598e493ebd5ea8b95fcd331df18886564c619 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Add image/svg+xml as a default mime type.
+
+    *DHH*
+
 ## Rails 5.0.0.beta2 (February 01, 2016) ##
 
 *   Add `-g` and `-c` (short for _grep_ and _controller_ respectively) options
diff --git a/actionpack/lib/action_dispatch/http/mime_types.rb b/actionpack/lib/action_dispatch/http/mime_types.rb
index 87715205d9b767fc10033e2fb2aaaae16d6d789f..8356d1a238aa137a1208a3c7ad42c0f695f75382 100644
--- a/actionpack/lib/action_dispatch/http/mime_types.rb
+++ b/actionpack/lib/action_dispatch/http/mime_types.rb
@@ -14,6 +14,7 @@
 Mime::Type.register "image/gif", :gif, [], %w(gif)
 Mime::Type.register "image/bmp", :bmp, [], %w(bmp)
 Mime::Type.register "image/tiff", :tiff, [], %w(tif tiff)
+Mime::Type.register "image/svg+xml", :svg
 
 Mime::Type.register "video/mpeg", :mpeg, [], %w(mpg mpeg mpe)