diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index ccea737..fcaa398 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -5,7 +5,7 @@
 # ╰───╯
 
 _spcd_fill() {
-    local index=${1}
+    local index="${1}"
     while [ "${index}" -gt 0 ]; do
         printf "%s" "${2}"
         index=$((index - 1))