diff --git a/lib/cmdlib.py b/lib/cmdlib.py
index bbbaa255b9430377d985c395ef034f7f69248913..cb13c054e45f2036b406eb92cab48de34e031bd6 100644
--- a/lib/cmdlib.py
+++ b/lib/cmdlib.py
@@ -12789,7 +12789,7 @@ class LUGroupAdd(LogicalUnit):
       self.op.diskparams = self.cfg.GetClusterInfo().diskparams
 
     cluster = self.cfg.GetClusterInfo()
-    full_ipolicy = cluster.SimpleFillIpolicy(self.op.ipolicy)
+    full_ipolicy = cluster.SimpleFillIPolicy(self.op.ipolicy)
     objects.InstancePolicy.CheckParameterSyntax(full_ipolicy)
 
   def BuildHooksEnv(self):