diff --git a/check_reboot_required b/check_reboot_required
index 57fa29f..3c7af6a 100755
--- a/check_reboot_required
+++ b/check_reboot_required
@@ -14,10 +14,10 @@ if [ -f "$rr" ]; then
 	lastmod=$(date +%s -r "$rr")
 	now=$(date +%s)
 	if (( now - lastmod > threshold )); then
-		echo "CRITICAL - Pending reboot older than $threshold seconds: $(cat rr)"
+		echo "CRITICAL - Pending reboot older than $threshold seconds: $(cat "$rr")"
 		exit 2
 	else
-		echo "WARNING - Pending reboot: $(cat rr)"
+		echo "WARNING - Pending reboot: $(cat "$rr")"
 		exit 1
 	fi
 else