diff --git a/frontend/catalyst/jax_primitives.py b/frontend/catalyst/jax_primitives.py
index 31bc82220..ab1d001bd 100644
--- a/frontend/catalyst/jax_primitives.py
+++ b/frontend/catalyst/jax_primitives.py
@@ -138,13 +138,13 @@ def __hash__(self):  # pragma: nocover
         return self.hash_value
 
 
-class ConcreteQbit(AbstractQbit):
+class ConcreteQbit:
     """Concrete Qbit."""
 
 
 def _qbit_lowering(aval):
     assert isinstance(aval, AbstractQbit)
-    return (ir.OpaqueType.get("quantum", "bit"),)
+    return ir.OpaqueType.get("quantum", "bit")
 
 
 #
@@ -162,13 +162,13 @@ def __hash__(self):
         return self.hash_value
 
 
-class ConcreteQreg(AbstractQreg):
+class ConcreteQreg:
     """Concrete quantum register."""
 
 
 def _qreg_lowering(aval):
     assert isinstance(aval, AbstractQreg)
-    return (ir.OpaqueType.get("quantum", "reg"),)
+    return ir.OpaqueType.get("quantum", "reg")
 
 
 #
@@ -2357,3 +2357,5 @@ def _scalar_abstractify(t):
 
 pytype_aval_mappings[type] = _scalar_abstractify
 pytype_aval_mappings[jax._src.numpy.scalar_types._ScalarMeta] = _scalar_abstractify
+pytype_aval_mappings[ConcreteQbit] = lambda _: AbstractQbit()
+pytype_aval_mappings[ConcreteQreg] = lambda _: AbstractQreg()