diff --git a/functions.inc.php b/functions.inc.php
index d64ac41f..f36b00b7 100644
--- a/functions.inc.php
+++ b/functions.inc.php
@@ -1189,6 +1189,7 @@ function pacrypt ($pw, $pw_db="")
     // this is apparently useful for pam_mysql etc.
     elseif ($CONF['encrypt'] == 'mysql_encrypt')
     {
+        $pw = escape_string($pw);
         if ($pw_db!="") {
             $salt=substr($pw_db,0,2);
             $res=db_query("SELECT ENCRYPT('".$pw."','".$salt."');");