diff --git a/src/G4System.cc b/src/G4System.cc
index 2e59ae8..a9e819d 100644
--- a/src/G4System.cc
+++ b/src/G4System.cc
@@ -75,8 +75,8 @@ void G4System::run_visualize(const std::string& partSpecies, double minEnergy, d
   // hard coded macro here
 
   check();
-
   std::vector<G4String> commands={
+     "/run/initialize",
      "/vis/open DAWNFILE",
      "/vis/drawVolume",
      "/vis/viewer/set/viewpointThetaPhi -90 0",