diff --git a/plugins/guests/solaris11/guest.rb b/plugins/guests/solaris11/guest.rb
index a4d3c5b75..f7c46ee57 100644
--- a/plugins/guests/solaris11/guest.rb
+++ b/plugins/guests/solaris11/guest.rb
@@ -8,7 +8,7 @@ module VagrantPlugins
   module GuestSolaris11
     class Guest < Vagrant.plugin("2", :guest)
       def detect?(machine)
-        machine.communicate.test("uname -sr | grep 'SunOS 5.11'")
+        machine.communicate.test("uname -sr | grep 'SunOS.*5\\.11'")
       end
     end
   end