diff --git a/src/progress.sh b/src/progress.sh
index 7c344f7..9c7549f 100644
--- a/src/progress.sh
+++ b/src/progress.sh
@@ -26,7 +26,7 @@ do
     bytes=$(du -sb "$file" | cut -f1)
     if (( bytes > 1000 )); then
       if [ -z "$total" ] || [[ "$total" == "0" ]]; then
-        size=$(formatBytes "$bytes")
+        size=$(numfmt --to=iec --suffix=B "$bytes" | sed -r 's/([A-Z])/ \1/')
       else
         size="$(echo "$bytes" "$total" | awk '{printf "%.1f", $1 * 100 / $2}')"
         size="$size%"