diff --git a/kernel.spec b/kernel.spec
index ab03e09..768ec3d 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -450,7 +450,7 @@ Qubes domU kernel.
 %post qubes-vm
 
 mkdir /tmp/qubes-modules-%kernelrelease
-truncate -s 200M /tmp/qubes-modules-%kernelrelease.img
+truncate -s 400M /tmp/qubes-modules-%kernelrelease.img
 mkfs -t ext3 -F /tmp/qubes-modules-%kernelrelease.img > /dev/null
 mount /tmp/qubes-modules-%kernelrelease.img /tmp/qubes-modules-%kernelrelease -o loop
 cp -a -t /tmp/qubes-modules-%kernelrelease %vm_install_dir/modules/%kernelrelease