diff --git a/qemu.sh b/qemu.sh
index e5860fa..cc340fe 100755
--- a/qemu.sh
+++ b/qemu.sh
@@ -1,3 +1,7 @@
+#!/bin/sh
+
+[ -e pladde.img ] || qemu-img create pladde.img 4G
+
 qemu-system-x86_64 \
 	-kernel vmlinuz \
 	-initrd initrd.gz \