diff --git a/group_vars/mirror.yml b/group_vars/mirror.yml
index 5fa1ea9..31fc5f0 100644
--- a/group_vars/mirror.yml
+++ b/group_vars/mirror.yml
@@ -1,7 +1,7 @@
 ---
 
 os_type: centos7
-dcentos7atadisk_size:
+datadisk_size:
   - 1000
 
 firewall_in: