diff --git a/devices/r8169/update.sh b/devices/r8169/update.sh
new file mode 100755
index 00000000..503fbb7c
--- /dev/null
+++ b/devices/r8169/update.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+if [ $# -ne 3 ]; then
+    echo "Need 3 arguments: 1) kernel source dir, 2) previous version, 3) version to add"
+    exit 1
+fi
+
+KERNELDIR=$1
+PREVER=$2
+KERNELVER=$3
+
+set -x
+
+for f in $KERNELDIR/drivers/net/ethernet/realtek/r8169*; do
+    echo Driver $f
+    b=$(basename $f)
+    o=${b/\./-$KERNELVER-orig.}
+    e=${b/\./-$KERNELVER-ethercat.}
+    cp -v $f $o
+    chmod 644 $o
+    cp -v $o $e
+    op=${b/\./-$PREVER-orig.}
+    ep=${b/\./-$PREVER-ethercat.}
+    diff -u $op $ep | patch -p1 $e
+    git add $o $e
+done
+
+echo "Remember to update Makefile.am!"