diff --git a/devices/e1000/update.sh b/devices/e1000/update.sh
index b4c28d49..f691be2a 100755
--- a/devices/e1000/update.sh
+++ b/devices/e1000/update.sh
@@ -21,7 +21,9 @@ for f in $KERNELDIR/drivers/net/ethernet/intel/e1000/*.[ch]; do
     cp -v $o $e
     op=${b/\./-$PREVER-orig.}
     ep=${b/\./-$PREVER-ethercat.}
-    diff -u $op $ep | patch -p1 $e
+    diff -p -u $op $ep | patch -p1 $e
     sed -i s/$PREVER-ethercat.h/$KERNELVER-ethercat.h/ $e
     git add $o $e
+    echo -e "\t$e \\\\\n\t$o \\\\" >> Makefile.am
 done
+echo "Remember to update Makefile.am!"