diff --git a/src/setup.jl b/src/setup.jl
index 13fc84a..d302efd 100644
--- a/src/setup.jl
+++ b/src/setup.jl
@@ -138,7 +138,7 @@ function init_sim_with_sim_consts(
     end
 
     start_datetime = Dates.now()
-    sim_dir *= "/$(start_datetime)_N=$(sim_consts.n_particles)_v=$(sim_consts.v₀)_#$(rand(1000:9999))"
+    sim_dir *= "/$(start_datetime)_N=$(sim_consts.n_particles)_v=$(sim_consts.v₀)_R$(rand(1000:9999))"
 
     if length(comment) > 0
         sim_dir *= "_$comment"