Index: uspace/lib/c/generic/task.c
===================================================================
--- uspace/lib/c/generic/task.c	(revision 6b10dab6510950964fc02ac960103bbaedf76314)
+++ uspace/lib/c/generic/task.c	(revision dd8d5a73bdea8475dd6109269d442c9d31c454a6)
@@ -47,8 +47,14 @@
 task_id_t task_get_id(void)
 {
+#ifdef __32_BITS__
 	task_id_t task_id;
 	(void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
 	
 	return task_id;
+#endif  /* __32_BITS__ */
+	
+#ifdef __64_BITS__
+	return (task_id_t) __SYSCALL0(SYS_TASK_GET_ID);
+#endif  /* __64_BITS__ */
 }