diff --git a/tuned/profiles/functions/function_cpulist_invert.py b/tuned/profiles/functions/function_cpulist_invert.py
index 39fa369..ee66d5a 100644
--- a/tuned/profiles/functions/function_cpulist_invert.py
+++ b/tuned/profiles/functions/function_cpulist_invert.py
@@ -19,6 +19,4 @@ class cpulist_invert(base.Function):
 	def execute(self, args):
 		if not super(self.__class__, self).execute(args):
 			return None
-		cpus = self._cmd.cpulist_unpack(",".join(args))
-		present = self._cmd.cpulist_unpack(self._cmd.read_file("/sys/devices/system/cpu/present"))
-		return ",".join(str(v) for v in set(present) - set(cpus))
+		return ",".join(str(v) for v in self._cmd.cpulist_invert(",".join(args)))
diff --git a/tuned/utils/commands.py b/tuned/utils/commands.py
index da73b12..9b3ba7b 100644
--- a/tuned/utils/commands.py
+++ b/tuned/utils/commands.py
@@ -155,6 +155,12 @@ class commands:
 					return []
 		return sorted(list(set(rl)))
 
+	# Inverts CPU list (i.e. makes its complement)
+	def cpulist_invert(self, l):
+		cpus = self.cpulist_unpack(l)
+		present = self.cpulist_unpack(self.read_file("/sys/devices/system/cpu/present"))
+		return list(set(present) - set(cpus))
+
 	# Converts CPU list to hexadecimal CPU mask
 	def cpulist2hex(self, l):
 		if l is None: