diff --git a/psydac/api/ast/utilities.py b/psydac/api/ast/utilities.py
index 00ad267c7..1693c6eda 100644
--- a/psydac/api/ast/utilities.py
+++ b/psydac/api/ast/utilities.py
@@ -33,6 +33,29 @@
 from psydac.pyccel.ast.core import String
 from psydac.pyccel.ast.core import AnnotatedArgument
 
+__all__ = (
+    'build_pyccel_type_annotations',
+    'build_pyccel_types_decorator',
+    'build_pythran_types_header',
+    'compute_atoms_expr',
+    'compute_atoms_expr_field',
+    'compute_atoms_expr_mapping',
+    'compute_boundary_jacobian',
+    'compute_normal_vector',
+    'compute_tangent_vector',
+    'filter_loops',
+    'filter_product',
+    'fusion_loops',
+    'get_name',
+    'is_mapping',
+    'logical2physical',
+    'math_atoms_as_str',
+    'random_string',
+    'rationalize_eval_mapping',
+    'select_loops',
+    'variables',
+)
+
 #==============================================================================
 def random_string( n ):
     chars    = string.ascii_lowercase + string.digits