diff --git a/deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml b/deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml
index 5608b9a572d..355fd1f5744 100644
--- a/deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml
+++ b/deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml
@@ -739,6 +739,10 @@ spec:
             # The Elasticsearch host to communicate with
             - name: ES_HOST
               value: ""
+            # The fingerprint of a root CA certificate used to sign
+            # Elasticsearch's TLS certificate
+            - name: CA_TRUSTED
+              value: ""
             - name: NODE_NAME
               valueFrom:
                 fieldRef: