diff --git a/regtest/crystallization/rt-averaged-q6-spAspB/traj_md-10.xyz b/regtest/crystallization/rt-averaged-q6-spAspB/traj_md-10.xyz
index 949fea854d..d7ff5b367b 100644
--- a/regtest/crystallization/rt-averaged-q6-spAspB/traj_md-10.xyz
+++ b/regtest/crystallization/rt-averaged-q6-spAspB/traj_md-10.xyz
@@ -1,5 +1,5 @@
 500
-Atoms. Timestep: 0
+24.85 24.85 24.85
 Xe 0.024598 24.63 0.520655
 Xe 0.171429 2.8939 2.52261
 Xe 2.5328 0.386652 2.48407