diff --git a/mm/swap_state.c b/mm/swap_state.c
index 6d1daeb..e10f583 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -8,6 +8,7 @@
  */
 #include <linux/module.h>
 #include <linux/mm.h>
+#include <linux/gfp.h>
 #include <linux/kernel_stat.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>