diff --git a/CentOS/check_diskspace.sh b/CentOS/check_diskspace.sh
index 36aae78..11c1a4e 100644
--- a/CentOS/check_diskspace.sh
+++ b/CentOS/check_diskspace.sh
@@ -1,10 +1,11 @@
 #!/bin/bash
 
+DISK_CHK_POLL_INTERVAL=${DISK_CHK_POLL_INTERVAL:-120}
 # Disk full
 while true
 do
         # sleep early to get glusterd settled
-        sleep 120
+        sleep $DISK_CHK_POLL_INTERVAL
         current_usage=$( df --output=pcent  '/var/lib/glusterd' | tail -n1  | awk {'print $1'} )
         max_usage=99%
         if [ "${current_usage%?}" -ge "${max_usage%?}" ]; then
diff --git a/CentOS/gluster-check-diskspace.service b/CentOS/gluster-check-diskspace.service
index 146c376..1eef8fa 100644
--- a/CentOS/gluster-check-diskspace.service
+++ b/CentOS/gluster-check-diskspace.service
@@ -4,7 +4,8 @@ After=glusterd.service
 
 [Service]
 Type=simple
-ExecStart=/usr/local/bin/check_diskspace.sh
+PassEnvironment=DISK_CHK_POLL_INTERVAL
+ExecStart=/usr/local/bin/check_diskspace.sh $DISK_CHK_POLL_INTERVAL
 
 [Install]
 WantedBy=multi-user.target