diff --git a/vllm/config/structured_outputs.py b/vllm/config/structured_outputs.py
index c4db15989..e7afbb65b 100644
--- a/vllm/config/structured_outputs.py
+++ b/vllm/config/structured_outputs.py
@@ -23,8 +23,6 @@ class StructuredOutputsConfig:
     regex, etc) by default. With "auto", we will make opinionated choices
     based on request contents and what the backend libraries currently support,
     so the behavior is subject to change in each release."""
-    disable_fallback: bool = False
-    """If `True`, vLLM will not fallback to a different backend on error."""
     disable_any_whitespace: bool = False
     """If `True`, json output will always be compact without any whitespace.
     If `False`, the model may generate whitespace between JSON fields,
diff --git a/vllm/sampling_params.py b/vllm/sampling_params.py
index a46e2afff..580dbb6ec 100644
--- a/vllm/sampling_params.py
+++ b/vllm/sampling_params.py
@@ -41,7 +41,6 @@ class StructuredOutputsParams:
     grammar: str | None = None
     json_object: bool | None = None
     # These are other options that can be set.
-    disable_fallback: bool = False
     disable_any_whitespace: bool = False
     disable_additional_properties: bool = False
     whitespace_pattern: str | None = None