2 files changed, 6 insertions, 4 deletions

diff --git a/src/syscalls.c b/src/syscalls.c
index bc14443..b2ab900 100644
--- a/src/syscalls.c
+++ b/src/syscalls.c
@@ -1,7 +1,6 @@
 /* To get syscall() we need to define _GNU_SOURCE
  * in modern glibc versions.
  */
-#define _GNU_SOURCE
 #include <unistd.h>
 #include <linux/unistd.h>
 #include <sys/types.h>
diff --git a/src/task.c b/src/task.c
index df12777..f9e4ccf 100644
--- a/src/task.c
+++ b/src/task.c
@@ -3,6 +3,8 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include <sched.h>
+
 #include "litmus.h"
 #include "internal.h"
 
@@ -61,17 +63,18 @@ int create_rt_task(rt_fn_t rt_prog, void *arg, int cpu, int wcet, int period) {
 
 int task_mode(int mode)
 {
-        int prio   = 0;
+        struct sched_param param;
         int me     = gettid();
         int policy = sched_getscheduler(gettid());
         int old_mode = policy == SCHED_LITMUS ? LITMUS_RT_TASK : BACKGROUND_TASK;
 
+        param.sched_priority = 0;
         if (old_mode == LITMUS_RT_TASK && mode == BACKGROUND_TASK) {
                 /* transition to normal task */
-                return sched_setscheduler(me, SCHED_NORMAL, &prio);
+                return sched_setscheduler(me, SCHED_NORMAL, &param);
         } else if (old_mode == BACKGROUND_TASK && mode == LITMUS_RT_TASK) {
                 /* transition to RT task */
-                return sched_setscheduler(me, SCHED_LITMUS, &prio);
+                return sched_setscheduler(me, SCHED_LITMUS, &param);
         } else {
                 errno = -EINVAL;
                 return -1;