diff --git a/sysdeps/unix/alpha/sysdep.h b/sysdeps/unix/alpha/sysdep.h
index 47d5f76833..01e7de0d06 100644
--- a/sysdeps/unix/alpha/sysdep.h
+++ b/sysdeps/unix/alpha/sysdep.h
@@ -129,6 +129,7 @@ $syscall_error:					\
 /* ??? Linux needs to be able to override INLINE_SYSCALL for one
    particular special case.  Make this easy.  */
 
+#undef INLINE_SYSCALL
 #define INLINE_SYSCALL(name, nr, args...) \
 	INLINE_SYSCALL1(name, nr, args)