Index: kernel/generic/src/proc/thread.c
===================================================================
--- kernel/generic/src/proc/thread.c	(revision c477c804d1208352d69c7b069a54d3e3b650ff96)
+++ kernel/generic/src/proc/thread.c	(revision aac506977cd4c2bd4f4d8d877a8e9b457321b790)
@@ -998,6 +998,6 @@
  *
  */
-sys_errno_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name,
-    size_t name_len, thread_id_t *uspace_thread_id)
+sys_errno_t sys_thread_create(uspace_ptr_uspace_arg_t uspace_uarg, uspace_ptr_char uspace_name,
+    size_t name_len, uspace_ptr_thread_id_t uspace_thread_id)
 {
 	if (name_len > THREAD_NAME_BUFLEN - 1)
@@ -1029,5 +1029,5 @@
 	    THREAD_FLAG_USPACE | THREAD_FLAG_NOATTACH, namebuf);
 	if (thread) {
-		if (uspace_thread_id != NULL) {
+		if (uspace_thread_id) {
 			rc = copy_to_uspace(uspace_thread_id, &thread->tid,
 			    sizeof(thread->tid));
@@ -1088,5 +1088,5 @@
  *
  */
-sys_errno_t sys_thread_get_id(thread_id_t *uspace_thread_id)
+sys_errno_t sys_thread_get_id(uspace_ptr_thread_id_t uspace_thread_id)
 {
 	/*