diff --git a/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.json b/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.json
index 951d6026e9a4..8cc3546fb0db 100644
--- a/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.json
+++ b/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.json
@@ -1024,7 +1024,7 @@
           {
             "properties": {
               "detected": {
-                "type": "string"
+                "type": "boolean"
               }
             }
           }
diff --git a/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.yaml b/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.yaml
index e75605cf4982..065fc0946c97 100644
--- a/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.yaml
+++ b/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2023-12-01-preview/inference.yaml
@@ -647,7 +647,7 @@ components:
         - $ref: '#/components/schemas/contentFilterResultBase'
         - properties:
             detected:
-              type: string
+              type: boolean
       required:
         - detected
         - filtered