diff --git a/website/cue/reference/components/sinks/base/elasticsearch.cue b/website/cue/reference/components/sinks/base/elasticsearch.cue
index 3dfa6c0e17ec2..759d17f345e2e 100644
--- a/website/cue/reference/components/sinks/base/elasticsearch.cue
+++ b/website/cue/reference/components/sinks/base/elasticsearch.cue
@@ -269,6 +269,11 @@ base: components: sinks: elasticsearch: configuration: {
 					syntax: "template"
 				}
 			}
+			template_fallback_index: {
+				description: "The default index to write events to if the template in `bulk.index` cannot be resolved"
+				required:    false
+				type: string: examples: ["test-index"]
+			}
 			version: {
 				description: "Version field value."
 				required:    false