diff --git a/fs/exec.c b/fs/exec.c
index 9696bbf..32993be 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -32,6 +32,7 @@
 #include <linux/swap.h>
 #include <linux/string.h>
 #include <linux/init.h>
+#include <linux/pagemap.h>
 #include <linux/highmem.h>
 #include <linux/spinlock.h>
 #include <linux/key.h>