diff --git a/ocaml/xcp-rrdd/bin/rrdp-dcmi/rrdp_dcmi.ml b/ocaml/xcp-rrdd/bin/rrdp-dcmi/rrdp_dcmi.ml
index 1246234346..dfc1878333 100644
--- a/ocaml/xcp-rrdd/bin/rrdp-dcmi/rrdp_dcmi.ml
+++ b/ocaml/xcp-rrdd/bin/rrdp-dcmi/rrdp_dcmi.ml
@@ -64,7 +64,7 @@ let gen_dcmi_power_reading value =
   ( Rrd.Host
   , Ds.ds_make ~name:"DCMI-power-reading"
       ~description:"Host power usage reported by IPMI DCMI"
-      ~value:(Rrd.VT_Int64 value) ~ty:Rrd.Gauge ~default:true ~units:"W" ~min:0.
+      ~value:(Rrd.VT_Int64 value) ~ty:Rrd.Gauge ~default:true ~units:"W" ~min:1. ~max:65534.
       ()
   )