diff --git a/csiborgtools/field/__init__.py b/csiborgtools/field/__init__.py
index 772b911..69e2ee1 100644
--- a/csiborgtools/field/__init__.py
+++ b/csiborgtools/field/__init__.py
@@ -15,12 +15,11 @@
 from warnings import warn
 
 try:
-    import MAS_library as MASL  # noqa
-
-    from .density import (DensityField, PotentialField,  # noqa
-                          TidalTensorField, VelocityField)
-    from .interp import (evaluate_cartesian, evaluate_sky, field2rsp,  # noqa
-                         fill_outside, make_sky, observer_vobs)
-    from .utils import nside2radec, smoothen_field  # noqa
+    import MAS_library as MASL                                                  # noqa
+    from .density import (DensityField, PotentialField, TidalTensorField,       # noqa
+                          VelocityField)                                        # noqa
+    from .interp import (evaluate_cartesian, evaluate_sky, field2rsp,           # noqa
+                         fill_outside, make_sky, observer_vobs)                 # noqa
+    from .utils import nside2radec, smoothen_field                              # noqa
 except ImportError:
-    warn("MAS_library not found, `DensityField` will not be available", UserWarning)  # noqa
+    warn("MAS_library not found, `DensityField` will not be available")