diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index a584d11c26..02569f8681 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -111409,7 +111409,7 @@
                     "$ref": "#/components/schemas/cluster._types:ComponentTemplateNode"
                   }
                 },
-                "index_template_subtitutions": {
+                "index_template_substitutions": {
                   "description": "A map of index template names to substitute index template definition objects.",
                   "type": "object",
                   "additionalProperties": {
diff --git a/output/schema/schema.json b/output/schema/schema.json
index 2fdfa32315..41dcb516e1 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -209342,7 +209342,7 @@
           },
           {
             "description": "A map of index template names to substitute index template definition objects.",
-            "name": "index_template_subtitutions",
+            "name": "index_template_substitutions",
             "required": false,
             "type": {
               "kind": "dictionary_of",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 23a742ba7a..e4372eb0ba 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -19593,7 +19593,7 @@ export interface SimulateIngestRequest extends RequestBase {
   body?: {
     docs: IngestDocument[]
     component_template_substitutions?: Record<string, ClusterComponentTemplateNode>
-    index_template_subtitutions?: Record<string, IndicesIndexTemplate>
+    index_template_substitutions?: Record<string, IndicesIndexTemplate>
     mapping_addition?: MappingTypeMapping
     pipeline_substitutions?: Record<string, IngestPipeline>
   }
diff --git a/specification/simulate/ingest/SimulateIngestRequest.ts b/specification/simulate/ingest/SimulateIngestRequest.ts
index ab18df72fb..5dd735150f 100644
--- a/specification/simulate/ingest/SimulateIngestRequest.ts
+++ b/specification/simulate/ingest/SimulateIngestRequest.ts
@@ -88,7 +88,7 @@ export interface Request extends RequestBase {
     /**
      * A map of index template names to substitute index template definition objects.
      */
-    index_template_subtitutions?: Dictionary<string, IndexTemplate>
+    index_template_substitutions?: Dictionary<string, IndexTemplate>
     mapping_addition?: TypeMapping
     /**
      * Pipelines to test.