diff --git a/bioblend/galaxy/histories/__init__.py b/bioblend/galaxy/histories/__init__.py
index 64e9d6ac4..df06f0a28 100644
--- a/bioblend/galaxy/histories/__init__.py
+++ b/bioblend/galaxy/histories/__init__.py
@@ -97,7 +97,6 @@ def _get_histories(
         keys: Optional[List[str]] = None,
         limit: Optional[int] = None,
         offset: Optional[int] = None,
-        all: Optional[bool] = False,
     ) -> List[Dict[str, Any]]:
         """
         Hidden method to be used by both get_histories() and get_published_histories()