diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 500886b..4c5bed9 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -51,6 +51,7 @@
 #include <linux/types.h>
 #include <linux/socket.h>
 #include <linux/ip.h>
+#include <linux/gfp.h>
 #include <net/sock.h>
 #include <net/sctp/sctp.h>
 #include <net/sctp/sm.h>