diff --git a/lib/dunlop/engine.rb b/lib/dunlop/engine.rb
index bfb2d43..3cf4444 100644
--- a/lib/dunlop/engine.rb
+++ b/lib/dunlop/engine.rb
@@ -81,6 +81,12 @@ module Dunlop
       if mime_magic_ms_dos_index = MimeMagic::MAGIC.index{|r| r == ['application/x-ms-dos-executable', [[0, 'MZ']]]}
         MimeMagic::MAGIC.delete_at(mime_magic_ms_dos_index)
       end
+
+      if mime_magix_x_executable_index = MimeMagic::MAGIC.index{|r| r.first == 'application/x-executable'}
+        if mime_magix_x_executable_mz_index = MimeMagic::MAGIC[mime_magix_x_executable_index][1].index{|r| r == [0, "MZ"]}
+          MimeMagic::MAGIC[mime_magix_x_executable_index][1].delete_at(mime_magix_x_executable_mz_index)
+        end
+      end
     end
   end
 end