diff --git a/src/sagemaker/model_monitor/dataset_format.py b/src/sagemaker/model_monitor/dataset_format.py
index 0e400f9841..f4c9c0b967 100644
--- a/src/sagemaker/model_monitor/dataset_format.py
+++ b/src/sagemaker/model_monitor/dataset_format.py
@@ -58,4 +58,4 @@ def sagemaker_capture_json():
             dict: JSON string containing DatasetFormat to be used by DefaultModelMonitor.
 
         """
-        return {"sagemaker_capture_json": {}}
+        return {"sagemakerCaptureJson": {}}