diff --git a/src/lib/conversion/rotation.h b/src/lib/conversion/rotation.h
index 80a9910d8b..9ea5f244c1 100644
--- a/src/lib/conversion/rotation.h
+++ b/src/lib/conversion/rotation.h
@@ -234,8 +234,8 @@ static constexpr bool rotate_3(enum Rotation rot, T &x, T &y, T &z)
 	case ROTATION_ROLL_90_YAW_90: {
 			T tmp = x;
 			x = z;
-			z = y;
-			y = tmp;
+			z = math::negate(y);
+			y = math::negate(tmp);
 		}
 
 		return true;