diff --git a/crypto/md5.c b/crypto/md5.c
index 1ed45f9..7f041ae 100644
--- a/crypto/md5.c
+++ b/crypto/md5.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/crypto.h>
+#include <linux/types.h>
 #include <asm/byteorder.h>
 
 #define MD5_DIGEST_SIZE		16