diff --git a/tests/test_option_callback.py b/tests/test_option_callback.py
index bed5273..3f64c5f 100644
--- a/tests/test_option_callback.py
+++ b/tests/test_option_callback.py
@@ -1514,6 +1514,18 @@ async def test_calc_value_remove_duplicate(config_type):
     assert not await list_sessions()
 
 
+@pytest.mark.asyncio
+async def test_calc_value_remove_duplicate2(config_type):
+    val1 = StrOption('val1', "", ['val1', 'val1'], multi=True, properties=('notunique',))
+    val2 = StrOption('val2', "", ['val1', 'val1'], multi=True, properties=('notunique',))
+    val3 = StrOption('val3', "", Calculation(calc_value, Params((ParamOption(val1), ParamOption(val2)), multi=ParamValue(True), remove_duplicate_value=ParamValue(True), join=ParamValue('-'))), multi=True)
+    od = OptionDescription('root', '', [val1, val2, val3])
+    async with await Config(od) as cfg:
+        cfg = await get_config(cfg, config_type)
+        assert await cfg.value.dict() == {'val1': ['val1', 'val1'], 'val2': ['val1', 'val1'], 'val3': ['val1-val1']}
+    assert not await list_sessions()
+
+
 @pytest.mark.asyncio
 async def test_calc_value_join(config_type):
     val1 = StrOption('val1', "", 'val1')
diff --git a/tiramisu/function.py b/tiramisu/function.py
index 8e2001e..8e4cfb5 100644
--- a/tiramisu/function.py
+++ b/tiramisu/function.py
@@ -361,7 +361,7 @@ class CalcValue:
                     value = []
             elif None in value and not allow_none:
                 value = []
-            elif remove_duplicate_value:
+            if remove_duplicate_value:
                 new_value = []
                 for val in value:
                     if val not in new_value: