diff --git a/tools/prepare.sh b/tools/prepare.sh
index c94b5104..961cb45e 100755
--- a/tools/prepare.sh
+++ b/tools/prepare.sh
@@ -9,3 +9,13 @@ if [ $SIZE -ne 0 ]; then
 else
 	echo not patching $NAME
 fi;
+
+NAME=initrd.img
+SIZE=`ls -ld "$NAME" | awk '{print $5 % 64}'`
+if [ $SIZE -ne 0 ]; then
+	echo "$NAME: patching $SIZE Zero-Bytes"
+	dd if=/dev/zero of=zero.bin bs=1 count=$SIZE
+	cat zero.bin >> $NAME
+else
+	echo not patching $NAME
+fi;