diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 8c86b802f212afa98ca588d06717e46d4b9afe3f..d091b2430b480254c4cb2743a28def0e6805486a 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -7,6 +7,7 @@
 
 #include <linux/device.h>
 #include <linux/fs.h>
+#include <linux/mm.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>