diff --git a/eic_data.yaml b/eic_data.yaml
index b8f31606422e456e13f30bbc74917ae1b7bf3e91..8f4a3fdf4680de06502685c04a9eefed3f984f91 100644
--- a/eic_data.yaml
+++ b/eic_data.yaml
@@ -172,6 +172,7 @@ components:
       declaration: "
         VectorXYZT() : x{0}, y{0}, z{0}, t{0} {}\n
         VectorXYZT(double xx, double yy, double zz, double tt) : x{xx}, y{yy}, z{zz}, t{tt} {}\n
+        VectorXYZT(const VectorXYZ& rr, double tt): x{rr.x}, y{rr.y}, z{rr.}, t{tt} {}\n
         double& operator[](unsigned i) {return *(&x + i);}\n
         const double& operator[](unsigned i) const {return *(&x + i);}\n
         double mag() const {return std::hypot(x, y, z);}\n