diff --git a/Asterisk.2013/Asterisk.NET/Common.cs b/Asterisk.2013/Asterisk.NET/Common.cs
index 66a089a..8070fd4 100644
--- a/Asterisk.2013/Asterisk.NET/Common.cs
+++ b/Asterisk.2013/Asterisk.NET/Common.cs
@@ -17,8 +17,8 @@ namespace AsterNET
         /// <summary>Line separator</summary>
         public const string LINE_SEPARATOR = "\r\n";
 
-        public static Regex ASTERISK_VERSION = new Regex("^Asterisk\\s+([0-9]+.[0-9]+.[0-9]+).*",
-            RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        public static Regex ASTERISK_VERSION = new Regex("^Asterisk\\s+\\D*([0-9]+.[0-9]+.[0-9]+|[1-9][0-9]-r[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 = {':'};
@@ -63,4 +63,4 @@ namespace AsterNET
 
         #endregion
     }
-}
\ No newline at end of file
+}