diff --git a/src/core/operations/A1Z26CipherDecode.mjs b/src/core/operations/A1Z26CipherDecode.mjs
index 0b097c2bf..cc9aafbf7 100644
--- a/src/core/operations/A1Z26CipherDecode.mjs
+++ b/src/core/operations/A1Z26CipherDecode.mjs
@@ -76,7 +76,7 @@ class A1Z26CipherDecode extends Operation {
         const delim = Utils.charRep(args[0] || "Space");
 
         if (input.length === 0) {
-            return [];
+            return "";
         }
 
         const bites = input.split(delim);