diff --git a/inventory/group_vars/buildvm b/inventory/group_vars/buildvm
index 33bff6fd02..da48830854 100644
--- a/inventory/group_vars/buildvm
+++ b/inventory/group_vars/buildvm
@@ -1,7 +1,7 @@
 ---
 # common items for the buildvm-* koji builders
 volgroup: /dev/BuildGuests
-lvm_size: 300000
+lvm_size: 307200
 mem_size: 15360
 max_mem_size: "{{ mem_size }}"
 num_cpus: 6