diff --git a/modules/archive.sh b/modules/archive.sh
index c020543..ea21bfb 100755
--- a/modules/archive.sh
+++ b/modules/archive.sh
@@ -10,6 +10,7 @@ size="$3"
 
 cleanup() {
 	[[ -n "$archive" ]] && rm -f "$archive*"
+
 	echo "Cleaned up all $archive files" >&2
 }
 
@@ -37,7 +38,7 @@ check_input() {
 	fi
 
 	if ! [[ "$size" =~ ^([1-9][0-9]*)?$ ]]; then
-		echo "Invalid size $size, must be a positive number"
+		echo "Invalid size $size, must be empty or a positive number"
 		exit 2
 	fi