diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index ec7cb79..a9bc579 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -197,7 +197,7 @@ class AttachmentsController < ApplicationController
   end
 
   def disposition(attachment)
-    if attachment.is_image? || attachment.is_pdf?
+    if attachment.is_pdf?
       'inline'
     else
       'attachment'
diff --git a/app/controllers/repositories_controller.rb b/app/controllers/repositories_controller.rb
index c963ee0..8da996e 100644
--- a/app/controllers/repositories_controller.rb
+++ b/app/controllers/repositories_controller.rb
@@ -443,7 +443,7 @@ class RepositoriesController < ApplicationController
   end
 
   def disposition(path)
-    if Redmine::MimeType.is_type?('image', @path) || Redmine::MimeType.of(@path) == "application/pdf"
+    if Redmine::MimeType.of(@path) == "application/pdf"
       'inline'
     else
       'attachment'