diff --git a/bin/touchid-enable-pam-sudo b/bin/touchid-enable-pam-sudo
index 363f78b..6c42fbc 100755
--- a/bin/touchid-enable-pam-sudo
+++ b/bin/touchid-enable-pam-sudo
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 # Enables sudo authentication using TouchID.
 
-pam_sudo_filename = "/etc/pam.d/sudo"
+pam_sudo_filename = "/etc/pam.d/sudo_local"
 pam_sudo_contents = File.read(pam_sudo_filename)
 if pam_sudo_contents.include?("pam_tid.so")
   unless ARGV.include?("--quiet")
@@ -10,7 +10,7 @@ if pam_sudo_contents.include?("pam_tid.so")
   exit
 end
 
-first_line = "# sudo: auth account password session"
+first_line = "# sudo_local: local config file which survives system update and is included for sudo"
 first_line_regex = /^#{first_line}$/
 unless pam_sudo_contents.match?(first_line_regex)
   warn "Error: #{pam_sudo_filename} is not in the expected format!"