diff --git a/include/net/dn.h b/include/net/dn.h
index 298521e0d8a2c1915377f127008225ed39d3dac9..814af0b9387dde4149b50d08a26c16b77e630eba 100644
--- a/include/net/dn.h
+++ b/include/net/dn.h
@@ -3,6 +3,7 @@
 
 #include <linux/dn.h>
 #include <net/sock.h>
+#include <net/flow.h>
 #include <asm/byteorder.h>
 #include <asm/unaligned.h>