diff --git a/src/lib/tecs/TECS.hpp b/src/lib/tecs/TECS.hpp
index b7acb085dc5..f362715e051 100644
--- a/src/lib/tecs/TECS.hpp
+++ b/src/lib/tecs/TECS.hpp
@@ -41,7 +41,7 @@
 
 #include <mathlib/mathlib.h>
 #include <matrix/math.hpp>
-#include <lib/ecl/AlphaFilter/AlphaFilter.hpp>
+#include <lib/mathlib/math/filter/AlphaFilter.hpp>
 
 #include <uORB/Publication.hpp>
 #include <uORB/topics/tecs_status.h>