diff --git a/Ciphers/AES.java b/Ciphers/AES.java
index d5211d3b..4290a808 100644
--- a/Ciphers/AES.java
+++ b/Ciphers/AES.java
@@ -363,7 +363,7 @@ public class AES {
       blockBits.append(cellBits);
     }
 
-    return new BigInteger(blockBits.toString(), 2);
+    return new BigInteger(blockBits.toStbring(), 2);
   }
 
   /**