diff --git a/hardware/raspberrypi/prometheus-exporter/files/raspberrypi_exporter.sh b/hardware/raspberrypi/prometheus-exporter/files/raspberrypi_exporter.sh
index 0d87bb2..8e65fae 100755
--- a/hardware/raspberrypi/prometheus-exporter/files/raspberrypi_exporter.sh
+++ b/hardware/raspberrypi/prometheus-exporter/files/raspberrypi_exporter.sh
@@ -2,7 +2,7 @@
 
 set -eu
 
-VCGEN="$(/opt/vc/bin/vcgencmd)"
+VCGEN="/opt/vc/bin/vcgencmd"
 METRICS_DIR="/tmp/textfile-collector"
 METRICS_FILE="${METRICS_DIR}/raspberrypi-metrics.prom"
 TMP_FILE="${METRICS_FILE}.tmp"