diff --git a/master/rtdm.c b/master/rtdm.c
index 1a335fe2..0112e1a7 100644
--- a/master/rtdm.c
+++ b/master/rtdm.c
@@ -28,13 +28,15 @@
 #include <linux/slab.h>
 #include <linux/mman.h>
 
-#include <rtdm/rtdm_driver.h>
 
 #include "master.h"
 #include "ioctl.h"
 #include "rtdm.h"
 #include "rtdm_details.h"
 
+/* include last because it does some redefinitions */
+#include <rtdm/rtdm_driver.h>
+
 /** Set to 1 to enable device operations debugging.
  */
 #define DEBUG 0