diff --git a/Makefile b/Makefile
index 401b8cf..255e94c 100644
--- a/Makefile
+++ b/Makefile
@@ -11,3 +11,4 @@ install: all
 	cp $(LIBRARY_NAME) $(DESTINATION)/$(LIBRARY_NAME).$(VERSION)
 	chmod 444 $(DESTINATION)/$(LIBRARY_NAME).$(VERSION)
 	chown root:wheel $(DESTINATION)/$(LIBRARY_NAME).$(VERSION)
+	./install-sudo
diff --git a/install-sudo b/install-sudo
new file mode 100755
index 0000000..0b0ac9d
--- /dev/null
+++ b/install-sudo
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+if grep "pam_watchid" /etc/pam.d/sudo > /dev/null; then
+  echo "Already configured for sudo."
+  exit
+fi
+
+sed '2i\
+auth       sufficient     pam_watchid.so
+' /etc/pam.d/sudo
\ No newline at end of file