diff --git a/packages/xo-server-load-balancer/src/plan.js b/packages/xo-server-load-balancer/src/plan.js
index e7d02f7a1..4ac09c057 100644
--- a/packages/xo-server-load-balancer/src/plan.js
+++ b/packages/xo-server-load-balancer/src/plan.js
@@ -99,10 +99,10 @@ export default class Plan {
     this._excludedHosts = excludedHosts
     this._thresholds = {
       cpu: {
-        critical: numberOrDefault(thresholds.cpu, DEFAULT_CRITICAL_THRESHOLD_CPU)
+        critical: numberOrDefault(thresholds && thresholds.cpu, DEFAULT_CRITICAL_THRESHOLD_CPU)
       },
       memoryFree: {
-        critical: numberOrDefault(thresholds.memoryFree, DEFAULT_CRITICAL_THRESHOLD_MEMORY_FREE) * 1024
+        critical: numberOrDefault(thresholds && thresholds.memoryFree, DEFAULT_CRITICAL_THRESHOLD_MEMORY_FREE) * 1024
       }
     }