diff --git a/input/grid5000/sites/strasbourg/pdus.yaml b/input/grid5000/sites/strasbourg/pdus.yaml
index fb68ee22d840fc63937ad80360f61bb2ae134a2e..e6fb67f5a16a43fab787cfc81fdb0cf007ccb871 100644
--- a/input/grid5000/sites/strasbourg/pdus.yaml
+++ b/input/grid5000/sites/strasbourg/pdus.yaml
@@ -287,6 +287,6 @@ pdus:
         description: Power consumption per outlet reported by wattmetre, in watt
         period: 1000
         optional_period: 10
-          source:
-            protocol: wattmetre
+        source:
+          protocol: wattmetre