diff --git a/src/lib/watchers/bma/head-watcher.ts b/src/lib/watchers/bma/head-watcher.ts
index 47c1787..75a9c04 100644
--- a/src/lib/watchers/bma/head-watcher.ts
+++ b/src/lib/watchers/bma/head-watcher.ts
@@ -4,7 +4,7 @@ import {WS2PHead} from "duniter/app/modules/ws2p/lib/WS2PCluster";
 
 function handleLateness(confHead: ConfHead, mainHeads: HeadMetric[], observedHead?: TrameWS2P) {
   if (!mainHeads.length) {
-    throw 'No consensus found'
+    throw 'Observed pubkey ${confHead.observedPubkey}: no consensus found'
   }
   if (!observedHead) {
     throw `Observed pubkey ${confHead.observedPubkey} not found in heads`
@@ -14,7 +14,7 @@ function handleLateness(confHead: ConfHead, mainHeads: HeadMetric[], observedHea
     // Check how much late is the node
     const farAwayHeads = mainHeads.filter(h => h.blockNumber - observedHead.blockNumber >= confHead.maxLateBlocks)
     if (farAwayHeads.length) {
-      throw `Observed pubkey is too late for ${farAwayHeads.length} consensus by at least ${confHead.maxLateBlocks}`
+      throw `Observed pubkey ${confHead.observedPubkey} is too late for ${farAwayHeads.length} consensus by at least ${confHead.maxLateBlocks}`
     }
   }
 }