diff --git a/plugins/lxc/lxc-multigraph b/plugins/lxc/lxc-multigraph
index ce759d04..24cda4bc 100755
--- a/plugins/lxc/lxc-multigraph
+++ b/plugins/lxc/lxc-multigraph
@@ -257,7 +257,7 @@ EOF
 multigraph lxc_net
 graph_title Network traffic
 graph_args --base 1000
-graph_vlabel bits in (-) / out (+) per ${graph_period}
+graph_vlabel bits in (-) / out (+) per \${graph_period}
 graph_category lxc
 graph_info This graph shows the traffic of active LXC containers.
 EOF