diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index 5107b7949c9cf1e950679d0265e4b5715fbf404f..6b30cc1b94b8c4b14494eb4751878023d3d96f84 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -27,6 +27,7 @@
 #include <linux/net.h>
 #include <linux/netdevice.h>
 #include <linux/phonet.h>
+#include <linux/proc_fs.h>
 #include <net/sock.h>
 #include <net/netns/generic.h>
 #include <net/phonet/pn_dev.h>