diff --git a/src/pvecontrol/actions/cluster.py b/src/pvecontrol/actions/cluster.py
index 2d07939..6f22163 100644
--- a/src/pvecontrol/actions/cluster.py
+++ b/src/pvecontrol/actions/cluster.py
@@ -36,7 +36,7 @@ def action_summary(proxmox, args):
     naturalsize(metrics['memory']['usage'], binary=True, format="%.2f"),
     naturalsize(metrics['memory']['total'], binary=True, format="%.2f"),
     metrics['memory']['percent'],
-    naturalsize(metrics['memory']['allocated']),
+    naturalsize(metrics['memory']['allocated'], binary=True, format="%.2f"),
   )
 
   metrics_disk_output = "{}/{}({:.1f}%)".format(