diff --git a/BM/tdx-compliance/tests-trigger-cpuid.sh b/BM/tdx-compliance/tests-trigger-cpuid.sh
index 398ba738..cf41455e 100755
--- a/BM/tdx-compliance/tests-trigger-cpuid.sh
+++ b/BM/tdx-compliance/tests-trigger-cpuid.sh
@@ -1,3 +1,4 @@
+##!/bin/bash
 # Some examples on how to trigger the cpuid and capture #VE.
 # Register the kretprobe.
 echo kretprobe > /sys/kernel/debug/tdx/tdx-tests
@@ -6,4 +7,4 @@ echo kretprobe > /sys/kernel/debug/tdx/tdx-tests
 echo trigger_cpuid 0x1f 0x0 0x0 0x0 > /sys/kernel/debug/tdx/tdx-tests
 
 # Unregister the kretprobe.
-echo unregister > /sys/kernel/debug/tdx/tdx-tests
\ No newline at end of file
+echo unregister > /sys/kernel/debug/tdx/tdx-tests