diff --git a/pyproject.toml b/pyproject.toml
index a35c4dd..80009b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -81,6 +81,7 @@ select = [
     "D",   # pydocstyle
     "C4",  # flake8-comprehensions
     "B",   # flake8-bugbear
+    "TCH", # flake8-type-checking
     "YTT", # flake8-2020
     "I",   # isort
     "UP",  # pyupgrade
diff --git a/src/gpgi/types.py b/src/gpgi/types.py
index 9ee6f09..5481dfd 100644
--- a/src/gpgi/types.py
+++ b/src/gpgi/types.py
@@ -31,7 +31,6 @@
     _deposit_tsc_3D,
     _index_particles,
 )
-from ._typing import FieldMap, Name
 
 if sys.version_info >= (3, 13):
     LockType = Lock
@@ -39,7 +38,7 @@
     from _thread import LockType
 
 if TYPE_CHECKING:
-    from ._typing import HCIArray, RealArray
+    from ._typing import FieldMap, HCIArray, Name, RealArray
 
 BoundarySpec = tuple[tuple[str, str, str], ...]