Fix #282 use modern arithmetic expansion in shell

[netdata.git] / charts.d / cpufreq.chart.sh

diff --git a/charts.d/cpufreq.chart.sh b/charts.d/cpufreq.chart.sh
index 6a968237de75983fe5c924a6a99e32adfff22e61..008ffe1d7066e5fa6cc9567d86e3b700dc7871ce 100755 (executable)
--- a/charts.d/cpufreq.chart.sh
+++ b/charts.d/cpufreq.chart.sh
@@ -36,7 +36,7 @@ cpufreq_create() {
        # - the highest speed we can achieve -
        [ $cpufreq_source_update -eq 1 ] && echo >$TMP_DIR/cpufreq.sh "cpufreq_update() {"
 
-       echo "CHART cpu.cpufreq '' 'CPU Clock' 'MHz' 'cpufreq' '' line $[cpufreq_priority + 1] $cpufreq_update_every"
+       echo "CHART cpu.cpufreq '' 'CPU Clock' 'MHz' 'cpufreq' '' line $((cpufreq_priority + 1)) $cpufreq_update_every"
        echo >>$TMP_DIR/cpufreq.sh "echo \"BEGIN cpu.cpufreq \$1\""
 
        i=0