diff --git a/include/class.mailparse.php b/include/class.mailparse.php
index f0ae3842ed9b70a52af2c4c5d206b8188d40c209..b9ab3c33ff34fd44496a92affbc38a276fc418b9 100644
--- a/include/class.mailparse.php
+++ b/include/class.mailparse.php
@@ -264,6 +264,8 @@ class Mail_Parse {
     }
 
     function parseAddressList($address){
+        if (!$address)
+            return false;
         return Mail_RFC822::parseAddressList($address, null, null,false);
     }