diff --git a/EKF/AlphaFilter.hpp b/AlphaFilter/AlphaFilter.hpp
similarity index 100%
rename from EKF/AlphaFilter.hpp
rename to AlphaFilter/AlphaFilter.hpp
diff --git a/EKF/estimator_interface.h b/EKF/estimator_interface.h
index 3ca6fb4efe..bcbbdc13d3 100644
--- a/EKF/estimator_interface.h
+++ b/EKF/estimator_interface.h
@@ -44,7 +44,7 @@
 #include <ecl.h>
 #include "common.h"
 #include "RingBuffer.h"
-#include "AlphaFilter.hpp"
+#include <AlphaFilter/AlphaFilter.hpp>
 #include "imu_down_sampler.hpp"
 #include "EKFGSF_yaw.h"
 #include "sensor_range_finder.hpp"
diff --git a/test/test_AlphaFilter.cpp b/test/test_AlphaFilter.cpp
index 8bedff1bf1..06c23299d3 100644
--- a/test/test_AlphaFilter.cpp
+++ b/test/test_AlphaFilter.cpp
@@ -41,7 +41,7 @@
 #include <cmath>
 #include <matrix/math.hpp>
 
-#include "EKF/AlphaFilter.hpp"
+#include "AlphaFilter/AlphaFilter.hpp"
 
 using matrix::Vector3f;