***************
*** 6,9 ****
   */
  
  #define PPTP_SOCKET_PREFIX "/var/run/pptp/"
  #define PPTP_CALLMGR_BINARY "./pptp_callmgr"
--- 6,12 ----
   */
  
  #define PPTP_SOCKET_PREFIX "/var/run/pptp/"
+ 
+ #ifndef PPTP_CALLMGR_BINARY
  #define PPTP_CALLMGR_BINARY "./pptp_callmgr"
+ #endif