diff --git a/common/kalman/.gitignore b/common/kalman/.gitignore
deleted file mode 100644
index d86912e7d0..0000000000
--- a/common/kalman/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-simple_kalman_impl.c
diff --git a/common/kalman/__init__.py b/common/kalman/__init__.py
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/common/kalman/tests/__init__.py b/common/kalman/tests/__init__.py
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/common/kalman/simple_kalman.py b/common/simple_kalman.py
similarity index 100%
rename from common/kalman/simple_kalman.py
rename to common/simple_kalman.py
diff --git a/common/kalman/tests/test_simple_kalman.py b/common/tests/test_simple_kalman.py
similarity index 92%
rename from common/kalman/tests/test_simple_kalman.py
rename to common/tests/test_simple_kalman.py
index 3afaf09d24..f641cd19e6 100644
--- a/common/kalman/tests/test_simple_kalman.py
+++ b/common/tests/test_simple_kalman.py
@@ -1,6 +1,6 @@
 import unittest
 
-from openpilot.common.kalman.simple_kalman import KF1D
+from openpilot.common.simple_kalman import KF1D
 
 
 class TestSimpleKalman(unittest.TestCase):
diff --git a/release/files_common b/release/files_common
index 2ef68651c8..6652643803 100644
--- a/release/files_common
+++ b/release/files_common
@@ -24,9 +24,6 @@ common/__init__.py
 common/*.py
 common/*.pyx
 
-common/kalman/.gitignore
-common/kalman/*
-
 common/transformations/__init__.py
 common/transformations/camera.py
 common/transformations/model.py
diff --git a/selfdrive/car/interfaces.py b/selfdrive/car/interfaces.py
index 9363fd659e..3bbf16c789 100644
--- a/selfdrive/car/interfaces.py
+++ b/selfdrive/car/interfaces.py
@@ -8,7 +8,7 @@ from typing import Any, Dict, Optional, Tuple, List, Callable
 from cereal import car
 from openpilot.common.basedir import BASEDIR
 from openpilot.common.conversions import Conversions as CV
-from openpilot.common.kalman.simple_kalman import KF1D, get_kalman_gain
+from openpilot.common.simple_kalman import KF1D, get_kalman_gain
 from openpilot.common.numpy_fast import clip
 from openpilot.common.realtime import DT_CTRL
 from openpilot.selfdrive.car import apply_hysteresis, gen_empty_fingerprint, scale_rot_inertia, scale_tire_stiffness, STD_CARGO_KG
diff --git a/selfdrive/controls/radard.py b/selfdrive/controls/radard.py
index f75b4b2059..4acadee7a7 100755
--- a/selfdrive/controls/radard.py
+++ b/selfdrive/controls/radard.py
@@ -11,7 +11,7 @@ from openpilot.common.params import Params
 from openpilot.common.realtime import Ratekeeper, Priority, config_realtime_process
 from openpilot.common.swaglog import cloudlog
 
-from openpilot.common.kalman.simple_kalman import KF1D
+from openpilot.common.simple_kalman import KF1D
 
 
 # Default lead acceleration decay set to 50% at 1s