diff --git a/docs/tasks/administer-cluster/memory-available.sh b/docs/tasks/administer-cluster/memory-available.sh
index 3e93dd2dc1..a699b1d2e2 100644
--- a/docs/tasks/administer-cluster/memory-available.sh
+++ b/docs/tasks/administer-cluster/memory-available.sh
@@ -10,7 +10,7 @@ memory_capacity_in_bytes=$((memory_capacity_in_kb * 1024))
 memory_usage_in_bytes=$(cat /sys/fs/cgroup/memory/memory.usage_in_bytes)
 memory_total_inactive_file=$(cat /sys/fs/cgroup/memory/memory.stat | grep total_inactive_file | awk '{print $2}')
 
-memory_working_set=$memory_usage_in_bytes
+memory_working_set=${memory_usage_in_bytes}
 if [ "$memory_working_set" -lt "$memory_total_inactive_file" ];
 then
     memory_working_set=0
@@ -28,4 +28,4 @@ echo "memory.total_inactive_file $memory_total_inactive_file"
 echo "memory.working_set $memory_working_set"
 echo "memory.available_in_bytes $memory_available_in_bytes"
 echo "memory.available_in_kb $memory_available_in_kb"
-echo "memory.available_in_mb $memory_available_in_mb"
\ No newline at end of file
+echo "memory.available_in_mb $memory_available_in_mb"