diff --git a/build/build-image/rsyncd.sh b/build/build-image/rsyncd.sh
index 21546e59d48..8c00838be10 100755
--- a/build/build-image/rsyncd.sh
+++ b/build/build-image/rsyncd.sh
@@ -45,7 +45,7 @@ mkdir -p "${CONFDIR}"
 if [[ -f "${PIDFILE}" ]]; then
   PID=$(cat "${PIDFILE}")
   echo "Cleaning up old PID file: ${PIDFILE}"
-  kill $PID &> /dev/null || true
+  kill "${PID}" &> /dev/null || true
   rm "${PIDFILE}"
 fi
 
diff --git a/hack/.shellcheck_failures b/hack/.shellcheck_failures
index c0cd214d0a6..cfe55784d58 100644
--- a/hack/.shellcheck_failures
+++ b/hack/.shellcheck_failures
@@ -1,4 +1,3 @@
-./build/build-image/rsyncd.sh
 ./build/common.sh
 ./build/copy-output.sh
 ./build/lib/release.sh