diff --git a/include/poll.h b/include/poll.h
index eaa1856..3a365b1 100644
--- a/include/poll.h
+++ b/include/poll.h
@@ -17,7 +17,7 @@ __fortify_poll(struct pollfd *fds, nfds_t nfds, int timeout)
 }
 
 #ifdef _GNU_SOURCE
-int
+static int
 __fortify_ppoll(struct pollfd *fds, nfds_t nfds,
                 const struct timespec *timeout, const sigset_t *mask)
 {