diff --git a/docs/reference/inference/service-openai.asciidoc b/docs/reference/inference/service-openai.asciidoc
index e7985bd97b848..eb2b86c1db584 100644
--- a/docs/reference/inference/service-openai.asciidoc
+++ b/docs/reference/inference/service-openai.asciidoc
@@ -80,7 +80,7 @@ include::inference-shared.asciidoc[tag=api-key-admonition]
 (Optional, integer)
 The number of dimensions the resulting output embeddings should have.
 Only supported in `text-embedding-3` and later models.
-
+If not set the OpenAI defined default for the model is used
 `model_id`:::
 (Required, string)
 The name of the model to use for the {infer} task.