diff --git a/src/backend/storage/ipc/dsm_impl.c b/src/backend/storage/ipc/dsm_impl.c
new file mode 100644
index 921f029..417048e
*** a/src/backend/storage/ipc/dsm_impl.c
--- b/src/backend/storage/ipc/dsm_impl.c
*************** dsm_impl_windows(dsm_op op, dsm_handle h
*** 689,694 ****
--- 689,696 ----
  		if (!hmap)
  		{
  			_dosmaperr(GetLastError());
+ 			if (errno == EACCES)
+ 				return false;
  			ereport(elevel,
  					(errcode_for_dynamic_shared_memory(),
  				  errmsg("could not create shared memory segment \"%s\": %m",