diff --git a/frontends/concrete-python/concrete/fhe/compilation/configuration.py b/frontends/concrete-python/concrete/fhe/compilation/configuration.py
index 4a728fa052..1f2a32d317 100644
--- a/frontends/concrete-python/concrete/fhe/compilation/configuration.py
+++ b/frontends/concrete-python/concrete/fhe/compilation/configuration.py
@@ -79,8 +79,8 @@ class Exactness(IntEnum):
     Exactness, to specify for specific operator the implementation preference (default and local).
     """
 
-    EXACT = 0
-    APPROXIMATE = 1
+    APPROXIMATE = 0
+    EXACT = 1
 
 
 @dataclass
diff --git a/frontends/concrete-python/concrete/fhe/extensions/round_bit_pattern.py b/frontends/concrete-python/concrete/fhe/extensions/round_bit_pattern.py
index c67380831d..0bbe75f49a 100644
--- a/frontends/concrete-python/concrete/fhe/extensions/round_bit_pattern.py
+++ b/frontends/concrete-python/concrete/fhe/extensions/round_bit_pattern.py
@@ -242,6 +242,10 @@ def round_bit_pattern(
 
         lsbs_to_remove = lsbs_to_remove.lsbs_to_remove
 
+    if not isinstance(exactness, Exactness):
+        msg = "exactness should be of type fhe.Exactness"
+        raise TypeError(msg)
+
     assert isinstance(lsbs_to_remove, int)
 
     def evaluator(
diff --git a/frontends/concrete-python/concrete/fhe/mlir/converter.py b/frontends/concrete-python/concrete/fhe/mlir/converter.py
index 533184eaeb..62ad2ac4a9 100644
--- a/frontends/concrete-python/concrete/fhe/mlir/converter.py
+++ b/frontends/concrete-python/concrete/fhe/mlir/converter.py
@@ -729,7 +729,7 @@ def tlu(self, ctx: Context, node: Node, preds: List[Conversion]) -> Conversion:
                 variable_input.origin.properties["exactness"]
                 or ctx.configuration.rounding_exactness
             )
-            if exactness == Exactness.APPROXIMATE:
+            if exactness is Exactness.APPROXIMATE:
                 # we clip values to enforce input precision exactly as queried
                 original_bit_width = variable_input.origin.properties["original_bit_width"]
                 lsbs_to_remove = variable_input.origin.properties["kwargs"]["lsbs_to_remove"]
diff --git a/frontends/concrete-python/concrete/fhe/mlir/processors/process_rounding.py b/frontends/concrete-python/concrete/fhe/mlir/processors/process_rounding.py
index 01abaaa8f5..01461e56ea 100644
--- a/frontends/concrete-python/concrete/fhe/mlir/processors/process_rounding.py
+++ b/frontends/concrete-python/concrete/fhe/mlir/processors/process_rounding.py
@@ -40,7 +40,7 @@ def apply(self, graph: Graph):
                 exactness = self.rounding_exactness
 
             if original_lsbs_to_remove != 0 and final_lsbs_to_remove == 0:
-                if exactness != Exactness.APPROXIMATE:
+                if exactness is not Exactness.APPROXIMATE:
                     self.replace_with_tlu(graph, node)
                 continue