diff --git a/src/core/include/units/bits/ratio_maths.h b/src/core/include/units/bits/ratio_maths.h
index 9ea155b6..c58fe5dd 100644
--- a/src/core/include/units/bits/ratio_maths.h
+++ b/src/core/include/units/bits/ratio_maths.h
@@ -22,7 +22,6 @@
 
 #pragma once
 
-#include <units/bits/external/hacks.h>
 #include <array>
 #include <cassert>
 #include <cmath>