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-rw-r--r--lib/paperclip/attachment_extensions.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/paperclip/attachment_extensions.rb b/lib/paperclip/attachment_extensions.rb
index 94f7769b6..e25a34213 100644
--- a/lib/paperclip/attachment_extensions.rb
+++ b/lib/paperclip/attachment_extensions.rb
@@ -27,7 +27,7 @@ module Paperclip
       return true  if original_filename == other_filename
       return false if original_filename.nil?
 
-      formats = styles.values.map(&:format).compact
+      formats = styles.values.filter_map(&:format)
 
       return false if formats.empty?