diff --git a/sos/report/plugins/kernelrt.py b/sos/report/plugins/kernelrt.py
index ee66697830..4a6d8c0d94 100644
--- a/sos/report/plugins/kernelrt.py
+++ b/sos/report/plugins/kernelrt.py
@@ -9,7 +9,7 @@
 #
 # See the LICENSE file in the source distribution for further information.
 
-from sos.report.plugins import Plugin, RedHatPlugin
+from sos.report.plugins import Plugin, RedHatPlugin, SoSPredicate
 
 
 class KernelRT(Plugin, RedHatPlugin):
@@ -36,6 +36,12 @@ def setup(self):
         # note: rhbz#1059685 'tuna - NameError: global name 'cgroups' is not
         # defined this command throws an exception on versions prior to
         # 0.10.4-5.
-        self.add_cmd_output('tuna -CP')
+        tuna_cmd = 'tuna'
+        co = {'cmd': '%s --help' % tuna_cmd, 'output': 'show_threads'}
+        if self.test_predicate(self, pred=SoSPredicate(self, cmd_outputs=co)):
+            tuna_cmd += ' show_threads -C'
+        else:
+            tuna_cmd += ' -CP'
+        self.add_cmd_output(tuna_cmd)
 
 # vim: set et ts=4 sw=4 :