diff --git a/build/docker/tools/tke-installer/install.sh b/build/docker/tools/tke-installer/install.sh
index 918daf399..d56e7dbe4 100755
--- a/build/docker/tools/tke-installer/install.sh
+++ b/build/docker/tools/tke-installer/install.sh
@@ -57,7 +57,7 @@ function prefight() {
 
   check::root
   check::disk '/opt' 30
-  check::disk '/var/lib' 20
+  check::disk '/var/lib/docker' 20
 }
 
 function check::root() {