diff --git a/build_ext.py b/build_ext.py
index a09673f..ba12e64 100644
--- a/build_ext.py
+++ b/build_ext.py
@@ -33,6 +33,7 @@ def build(setup_kwargs: Any) -> None:
                     [
                         "src/habluetooth/advertisement_tracker.py",
                         "src/habluetooth/base_scanner.py",
+                        "src/habluetooth/manager.py",
                         "src/habluetooth/scanner.py",
                     ],
                     compiler_directives={"language_level": "3"},  # Python 3