diff --git a/tuned/plugins/plugin_scheduler.py b/tuned/plugins/plugin_scheduler.py
index 381670d..2d8f1f6 100644
--- a/tuned/plugins/plugin_scheduler.py
+++ b/tuned/plugins/plugin_scheduler.py
@@ -165,6 +165,9 @@ class SchedulerPlugin(base.Plugin):
 		ps = self.get_processes()
 		for pid, vals in instance._scheduler_original.iteritems():
 			# if command line for the pid didn't change, it's very probably the same process
-			if ps[pid] == vals[0]:
-				self._set_rt(pid, self._sched2param(vals[1]), vals[2])
-				self._set_affinity(pid, vals[3])
+			try:
+				if ps[pid] == vals[0]:
+					self._set_rt(pid, self._sched2param(vals[1]), vals[2])
+					self._set_affinity(pid, vals[3])
+			except KeyError as e:
+				pass