diff --git a/cpukit/rtems/include/rtems/rtems/tasks.h b/cpukit/rtems/include/rtems/rtems/tasks.h
index 9101d9c063..72eb553a15 100644
--- a/cpukit/rtems/include/rtems/rtems/tasks.h
+++ b/cpukit/rtems/include/rtems/rtems/tasks.h
@@ -535,9 +535,9 @@ rtems_status_code rtems_task_get_affinity(
  * @retval RTEMS_INVALID_NUMBER Invalid processor affinity set.
  */
 rtems_status_code rtems_task_set_affinity(
-  rtems_id             id,
-  size_t               cpusetsize,
-  cpu_set_t           *cpuset
+  rtems_id         id,
+  size_t           cpusetsize,
+  const cpu_set_t *cpuset
 );
 #endif
 
diff --git a/cpukit/rtems/src/tasksetaffinity.c b/cpukit/rtems/src/tasksetaffinity.c
index 3294f97639..a7a18be4d5 100644
--- a/cpukit/rtems/src/tasksetaffinity.c
+++ b/cpukit/rtems/src/tasksetaffinity.c
@@ -26,9 +26,9 @@
 #include <rtems/score/schedulerimpl.h>
 
 rtems_status_code rtems_task_set_affinity(
-  rtems_id             id,
-  size_t               cpusetsize,
-  cpu_set_t           *cpuset
+  rtems_id         id,
+  size_t           cpusetsize,
+  const cpu_set_t *cpuset
 )
 {
   Thread_Control        *the_thread;