diff --git a/fondutils/determizer.py b/fondutils/determizer.py
index 8165ff3..11feba5 100644
--- a/fondutils/determizer.py
+++ b/fondutils/determizer.py
@@ -3,13 +3,14 @@
 from pddl.action import Action
 from pddl.core import Domain
 from pddl.logic.base import OneOf, And, Not
+from pddl.logic.effects import When
 from pddl.logic.predicates import Predicate
 from pddl.requirements import Requirements
 
 
 from .normalizer import normalize_operator
 
-DEBUG = False
+DEBUG = True
 
 
 def determinize(domain: Domain, dom_suffix: str = "ALLOUT", op_prefix: str = "_DETDUP_", op_suffix: str = "") -> Domain:
@@ -47,7 +48,7 @@ def determinize(domain: Domain, dom_suffix: str = "ALLOUT", op_prefix: str = "_D
             counter = 1
             for eff in new_act.effect.operands:
                 assert isinstance(
-                    eff, (And, Predicate, Not)
+                    eff, (And, Predicate, Not, When)
                 ), f"Effect in OneOf is not an And effect: {eff}"
                 new_actions.append(
                     Action(
diff --git a/tests/domain_07.pddl b/tests/domain_07.pddl
new file mode 100644
index 0000000..2a0dc86
--- /dev/null
+++ b/tests/domain_07.pddl
@@ -0,0 +1,18 @@
+;; multiple oneof cross product
+(define (domain blocks-domain)
+  (:requirements :non-deterministic :equality :typing :adl)
+  (:predicates
+    (f1) (f2) (f3) (f13)
+  )
+
+  (:action test
+    :parameters ()
+    :precondition (and (f13))
+    :effect (oneof
+      (when
+        (f1)
+        (f2))
+      (f3)
+    )
+  )
+)
\ No newline at end of file
diff --git a/tests/domain_07_det.pddl b/tests/domain_07_det.pddl
new file mode 100644
index 0000000..0ef9674
--- /dev/null
+++ b/tests/domain_07_det.pddl
@@ -0,0 +1,14 @@
+(define (domain blocks-domain)
+    (:requirements :adl :equality :typing)
+    (:predicates (f1) (f13) (f2) (f3))
+    (:action test_DETDUP_1
+        :parameters ()
+        :precondition (f13)
+        :effect (when (f1) (f2))
+    )
+     (:action test_DETDUP_2
+        :parameters ()
+        :precondition (f13)
+        :effect (f3)
+    )
+)
\ No newline at end of file
diff --git a/tests/test_det.py b/tests/test_det.py
index 2707cec..4cfbcea 100644
--- a/tests/test_det.py
+++ b/tests/test_det.py
@@ -112,6 +112,16 @@ def test_09():
 
     assert domain_to_string(domain_det) == domain_expected
 
+def test_10():
+    """tests if we have a basic condeff as an outcome"""
+    domain = parse_domain(TEST_DIRECTORY / "domain_07.pddl")
+    domain_det = determinize(domain, dom_suffix="")
+
+    with open(TEST_DIRECTORY / "domain_07_det.pddl", "r") as file:
+        domain_expected = file.read()
+
+    assert domain_to_string(domain_det) == domain_expected
+
 
 if __name__ == "__main__":
     test_01()
@@ -123,3 +133,4 @@ def test_09():
     test_07()
     test_08()
     test_09()
+    test_10()
\ No newline at end of file