diff --git a/luprex/syscpp/util.hpp b/luprex/syscpp/util.hpp
index 57c767b5..03fad372 100644
--- a/luprex/syscpp/util.hpp
+++ b/luprex/syscpp/util.hpp
@@ -44,7 +44,11 @@ uint32_t hash3(uint32_t a, uint32_t b, uint32_t c);
 // Returns a floating point value between lo and hi inclusive.
 double hash_to_float(double lo, double hi, uint32_t a, uint32_t b, uint32_t c);
 
-using XYZ = std::tuple<float, float, float>;
+struct XYZ {
+    float x, y, z;
+    XYZ() { x=0; y=0; z=0; }
+    XYZ(float ix, float iy, float iz) { x=ix; y=iy; z=iz; }
+};
 
 } // namespace util
 #endif // UTIL_HPP