diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 8fc04b4..1451790 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -26,6 +26,7 @@
 #include <linux/bootmem.h>
 #include <linux/splice.h>
 #include <linux/pfn.h>
+#include <linux/export.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>