diff --git a/libs/util/include/psemek/util/fixed_point.hpp b/libs/util/include/psemek/util/fixed_point.hpp
index 116e480a..472ec7d7 100644
--- a/libs/util/include/psemek/util/fixed_point.hpp
+++ b/libs/util/include/psemek/util/fixed_point.hpp
@@ -337,9 +337,8 @@ namespace psemek::util
 	constexpr fixed_point<I, F, S> abs(fixed_point<I, F, S> x)
 	{
 		using FP = fixed_point<I, F, S>;
-		using rep_type = typename FP::rep_type;
 		if constexpr (S)
-			return FP::from_rep(x.rep() & ~(static_cast<rep_type>(1) << (I + F - 1)));
+			return FP::from_rep(std::abs(x.rep()));
 		else
 			return x;
 	}