diff --git a/sim/vcs/run_vcs b/sim/vcs/run_vcs
index a9e9c2fca..00bfea9c7 100755
--- a/sim/vcs/run_vcs
+++ b/sim/vcs/run_vcs
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # run_vcs
 # David_Harris@hmc.edu 2 July 2024