diff --git a/lib/wand.rb b/lib/wand.rb
index 33bdfa9..30e349f 100644
--- a/lib/wand.rb
+++ b/lib/wand.rb
@@ -3,7 +3,7 @@
 module Wand
   def self.wave(path)
     type = MIME::Types.type_for(path)[0].to_s
-    type = %x[#{executable} --mime --brief #{path}].split(';')[0] if type.nil? || type == ''
+    type = `#{executable} --mime --brief #{path}`.split(';')[0] if type.nil? || type == ''
     type = nil if type =~ /cannot\sopen/
     type
   end