diff --git a/aes.module b/aes.module
index 1e62f51..df625b5 100755
--- a/aes.module
+++ b/aes.module
@@ -692,7 +692,7 @@ The decrypted string on success, false on error.
 function aes_decrypt($string, $base64encoded = true, $custom_key = null, $custom_cipher = null, $custom_iv = null, $custom_implementation = null) {
  
  //bail out if the passed string is empty
- if(empty($string)) {
+ if(isset($string)) {
   watchdog("aes", "Tried to decrypt an empty string.", array(), WATCHDOG_WARNING);
   return false;
  }