diff --git a/tools/update_syscalls.sh b/tools/update_syscalls.sh
new file mode 100755
index 0000000..3ad95ed
--- /dev/null
+++ b/tools/update_syscalls.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd $DIR/..
+./libc/tools/gensyscalls.py
+
+git diff --exit-code HEAD libc/arch-*/syscalls/
+exit $?