diff --git a/Asterisk.2013/Asterisk.NET/Common.cs b/Asterisk.2013/Asterisk.NET/Common.cs
index cfc8e43..93a62e1 100644
--- a/Asterisk.2013/Asterisk.NET/Common.cs
+++ b/Asterisk.2013/Asterisk.NET/Common.cs
@@ -18,8 +18,8 @@ namespace AsterNET
         /// <summary>Line separator</summary>
         public const string LINE_SEPARATOR = "\r\n";
 
-        public static Regex ASTERISK_VERSION = new Regex( "^Asterisk\\s+\\D*([0-9]+\\.[0-9]+\\.[0-9]+|[1-9][0-9]-r[0-9]+|[0-9]+\\.[0-9]+-cert[0-9]).*$",
-                    RegexOptions.Compiled | RegexOptions.IgnoreCase );
+        public static Regex ASTERISK_VERSION = new Regex("^(?:Output: ){0,1}Asterisk\\s+\\D*([0-9]+\\.[0-9]+\\.[0-9]+|[1-9][0-9]-r[0-9]+|[0-9]+\\.[0-9]+-cert[0-9]).*$",
+                          RegexOptions.Compiled | RegexOptions.IgnoreCase );
 
         public static Regex SHOW_VERSION_FILES_PATTERN = new Regex("^([\\S]+)\\s+Revision: ([0-9\\.]+)");
         public static char[] RESPONSE_KEY_VALUE_SEPARATOR = {':'};