diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 35b4ec8..e30b0c6 100644
*** a/src/backend/postmaster/postmaster.c
--- b/src/backend/postmaster/postmaster.c
*************** internal_forkexec(int argc, char *argv[]
*** 4487,4492 ****
--- 4487,4493 ----
  static pid_t
  internal_forkexec(int argc, char *argv[], Port *port)
  {
+ 	int			retry_count = 0;
  	STARTUPINFO si;
  	PROCESS_INFORMATION pi;
  	int			i;
*************** internal_forkexec(int argc, char *argv[]
*** 4504,4509 ****
--- 4505,4513 ----
  	Assert(strncmp(argv[1], "--fork", 6) == 0);
  	Assert(argv[2] == NULL);
  
+ 	/* Resume here if we need to retry */
+ retry:
+ 
  	/* Set up shared memory for parameter passing */
  	ZeroMemory(&sa, sizeof(sa));
  	sa.nLength = sizeof(sa);
*************** internal_forkexec(int argc, char *argv[]
*** 4595,4616 ****
  
  	/*
  	 * Reserve the memory region used by our main shared memory segment before
! 	 * we resume the child process.
  	 */
  	if (!pgwin32_ReserveSharedMemoryRegion(pi.hProcess))
  	{
! 		/*
! 		 * Failed to reserve the memory, so terminate the newly created
! 		 * process and give up.
! 		 */
  		if (!TerminateProcess(pi.hProcess, 255))
  			ereport(LOG,
  					(errmsg_internal("could not terminate process that failed to reserve memory: error code %lu",
  									 GetLastError())));
  		CloseHandle(pi.hProcess);
  		CloseHandle(pi.hThread);
! 		return -1;				/* logging done made by
! 								 * pgwin32_ReserveSharedMemoryRegion() */
  	}
  
  	/*
--- 4599,4624 ----
  
  	/*
  	 * Reserve the memory region used by our main shared memory segment before
! 	 * we resume the child process.  Normally this should succeed, but if ASLR
! 	 * is active then it might sometimes fail due to the executable having
! 	 * gotten mapped into that range.  In that case, just terminate the
! 	 * process and retry.
  	 */
  	if (!pgwin32_ReserveSharedMemoryRegion(pi.hProcess))
  	{
! 		/* pgwin32_ReserveSharedMemoryRegion already made a log entry */
  		if (!TerminateProcess(pi.hProcess, 255))
  			ereport(LOG,
  					(errmsg_internal("could not terminate process that failed to reserve memory: error code %lu",
  									 GetLastError())));
  		CloseHandle(pi.hProcess);
  		CloseHandle(pi.hThread);
! 		if (++retry_count < 100)
! 			goto retry;
! 		ereport(LOG,
! 		  (errmsg("giving up after too many tries to reserve shared memory"),
! 		   errhint("This might be caused by ASLR or antivirus software.")));
! 		return -1;
  	}
  
  	/*