diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 5a1a98df3499841172f47b71418f95d9558158d0..ac095936552d945d864facdb6b7bacd48655b47f 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -74,7 +74,7 @@ DEFINE_RWLOCK(x25_list_lock);
 
 static const struct proto_ops x25_proto_ops;
 
-static struct x25_address null_x25_address = {"               "};
+static const struct x25_address null_x25_address = {"               "};
 
 #ifdef CONFIG_COMPAT
 struct compat_x25_subscrip_struct {