diff --git a/lib/facter/memorytotalbytes.rb b/lib/facter/memorytotalbytes.rb
index 829810d..157196d 100755
--- a/lib/facter/memorytotalbytes.rb
+++ b/lib/facter/memorytotalbytes.rb
@@ -2,6 +2,6 @@
 
 Facter.add("memorytotalbytes") do
   setcode do
-    Facter::Util::Resolution.exec('free -bo | sed -n \'s/^Mem:\W\+\([0-9]\+\).*$/\1/p\'')
+    Facter::Util::Resolution.exec('free -b | sed -n \'s/^Mem:\W\+\([0-9]\+\).*$/\1/p\'')
   end
 end