diff --git a/setup.py b/setup.py
index 23f8b11..0590d59 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name="pyvalem",
-    version="2.6",
+    version="2.6.1",
     description="A package for managing simple chemical species and states",
     long_description=long_description,
     long_description_content_type="text/x-rst",
diff --git a/src/pyvalem/states/__init__.py b/src/pyvalem/states/__init__.py
index 05994e8..21d6cab 100644
--- a/src/pyvalem/states/__init__.py
+++ b/src/pyvalem/states/__init__.py
@@ -12,3 +12,4 @@
 from .vibrational_state import VibrationalState, VibrationalStateError
 from .generic_excited_state import GenericExcitedState, GenericExcitedStateError
 from .key_value_pair import KeyValuePair, KeyValuePairError
+from .compound_LS_coupling import CompoundLSCoupling, CompoundLSCouplingError
diff --git a/tests/test_imports.py b/tests/test_imports.py
new file mode 100644
index 0000000..9b40674
--- /dev/null
+++ b/tests/test_imports.py
@@ -0,0 +1,9 @@
+import unittest
+
+from pyvalem import states
+
+
+class StatesImportTest(unittest.TestCase):
+    def test_state_types_import(self):
+        self.assertIn("AtomicTermSymbol", states.__dict__)
+        self.assertIn("CompoundLSCoupling", states.__dict__)