diff --git a/pythonbpf/expr/__init__.py b/pythonbpf/expr/__init__.py
index 55eae5e..d58c543 100644
--- a/pythonbpf/expr/__init__.py
+++ b/pythonbpf/expr/__init__.py
@@ -1,3 +1,4 @@
-from .expr_pass import eval_expr, handle_expr, convert_to_bool
+from .expr_pass import eval_expr, handle_expr
+from .type_normalization import convert_to_bool
 
 __all__ = ["eval_expr", "handle_expr", "convert_to_bool"]