diff --git a/src/marshmallow/schema.py b/src/marshmallow/schema.py
index 78b386717..eb8339408 100644
--- a/src/marshmallow/schema.py
+++ b/src/marshmallow/schema.py
@@ -843,7 +843,12 @@ def _do_load(
         if self._has_processors(PRE_LOAD):
             try:
                 processed_data = self._invoke_load_processors(
-                    PRE_LOAD, data, many=many, original_data=data, partial=partial
+                    PRE_LOAD, 
+                    data, 
+                    many=many, 
+                    original_data=data, 
+                    partial=partial, 
+                    unknown=unknown
                 )
             except ValidationError as err:
                 errors = err.normalized_messages()