diff --git a/1990/stig/stig.sh b/1990/stig/stig.sh
index c8f0bdd87..42628e5ae 100755
--- a/1990/stig/stig.sh
+++ b/1990/stig/stig.sh
@@ -1 +1,2 @@
+#!/usr/bin/env bash
 alias c="cc -Wno-implicit-int -E -Dc='int main(){printf(\"N%sested comments allowed.\\n"'",/*/*/0*/**/1?"":"o n"'");}' stig.c|grep -v '^#'>o.c;cc -include stdio.h -o o o.c;./o"