diff --git a/lib/common/hacks.rb b/lib/common/hacks.rb
index d374517e..7c091db6 100644
--- a/lib/common/hacks.rb
+++ b/lib/common/hacks.rb
@@ -76,7 +76,7 @@ class File
   #
   # @return [ String ] The charset of the file
   def self.charset(file_path)
-    %x{file -i #{file_path}}[%r{charset=([^\n]+)\n}, 1]
+    %x{file --mime #{file_path}}[%r{charset=([^\n]+)\n}, 1]
   end
 end