diff -r c67a3647891d -r 045624f7f4c3 lib/common.c
--- a/lib/common.c	Sun Jul 22 23:17:59 2018 +0200
+++ b/lib/common.c	Mon Jul 30 11:18:45 2018 +0200
@@ -87,18 +87,10 @@
     master->first_config = NULL;
 
     snprintf(path, MAX_PATH_LEN - 1,
-#ifdef USE_RTDM
-            "EtherCAT%u",
-#else
             "/dev/EtherCAT%u",
-#endif
             master_index);
 
-#ifdef USE_RTDM
-    master->fd = rt_dev_open(path, O_RDWR);
-#else
     master->fd = open(path, O_RDWR);
-#endif
     if (EC_IOCTL_IS_ERROR(master->fd)) {
         fprintf(stderr, "Failed to open %s: %s\n", path,
                 strerror(EC_IOCTL_ERRNO(master->fd)));