Index: uspace/lib/c/generic/async/client.c
===================================================================
--- uspace/lib/c/generic/async/client.c	(revision 4f13e19af6dd310dbc87a66e115ff6ac62b71bde)
+++ uspace/lib/c/generic/async/client.c	(revision 9e7406a2a39bbff4e859b08f08ee4427c1384ab3)
@@ -95,10 +95,10 @@
  */
 
-#define LIBC_ASYNC_C_
+#define _LIBC_ASYNC_C_
 #include <ipc/ipc.h>
 #include <async.h>
 #include "../private/async.h"
 #include "../private/ns.h"
-#undef LIBC_ASYNC_C_
+#undef _LIBC_ASYNC_C_
 
 #include <ipc/irq.h>