diff --git a/defaults/main.yml b/defaults/main.yml
index 6d57e0e..e10cc80 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -2,7 +2,8 @@
 # defaults file for apigee-lvm-increase-volume-size
 partnum: 3
 typecode: 8300
-device_name: /dev/xvda
+device_name: xvda
+device_path: "/dev/{{ device_name }}"
 volume_name: vgroot
 logical_volume_name: lvvar
 percent_volume_extend: 20
diff --git a/tasks/main.yml b/tasks/main.yml
index 53bbd0a..d361669 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -7,7 +7,7 @@
     state: present
 
 - name: Create partition from available space
-  shell: "/usr/sbin/sgdisk --new {{ partnum }}:$(/usr/sbin/sgdisk -F):$(/usr/sbin/sgdisk -E) --mbrtogpt --typecode {{ partnum }}:{{ typecode }} --print {{ device_name }}"
+  shell: "/usr/sbin/sgdisk --new {{ partnum }}:$(/usr/sbin/sgdisk -F):$(/usr/sbin/sgdisk -E) --mbrtogpt --typecode {{ partnum }}:{{ typecode }} --print {{ device_path }}"
 
 - name: Re-read partition table
   shell: /usr/sbin/partprobe