diff --git a/python/cog/types.py b/python/cog/types.py
index f4110e68ca..732bf9d818 100644
--- a/python/cog/types.py
+++ b/python/cog/types.py
@@ -1,3 +1,4 @@
+import inspect
 import io
 import mimetypes
 import os
@@ -53,6 +54,28 @@ class CogBuildConfig(TypedDict, total=False):  # pylint: disable=too-many-ancest
     run: Optional[Union[List[str], List[Dict[str, Any]]]]
 
 
+# The following decorator is used to mutate the definition of choices in the
+# case that the value(s) are duplicated. This results in the inability to
+# create the enum as the values are not unique. This is generally a hack to
+# work around previously created invalid schemas.
+def _deduplicate_choices(func: Any) -> Any:
+    def wrapper(*args: Any, **kwargs: Any) -> Any:
+        sig = inspect.signature(func)
+        bound_args = sig.bind(*args, **kwargs)
+        bound_args.apply_defaults()
+
+        if (
+            "choices" in bound_args.arguments
+            and bound_args.arguments["choices"] is not None
+        ):
+            bound_args.arguments["choices"] = list(set(bound_args.arguments["choices"]))
+
+        return func(*bound_args.args, **bound_args.kwargs)
+
+    return wrapper
+
+
+@_deduplicate_choices
 def Input(  # pylint: disable=invalid-name, too-many-arguments
     default: Any = ...,
     description: str = None,
diff --git a/python/tests/server/fixtures/input_choices.py b/python/tests/server/fixtures/input_choices.py
index 659ee20e3f..28f0a8d99f 100644
--- a/python/tests/server/fixtures/input_choices.py
+++ b/python/tests/server/fixtures/input_choices.py
@@ -2,6 +2,6 @@
 
 
 class Predictor(BasePredictor):
-    def predict(self, text: str = Input(choices=["foo", "bar"])) -> str:
+    def predict(self, text: str = Input(choices=["foo", "bar", "foo"])) -> str:
         assert type(text) == str
         return text