diff --git a/fs/ext4/ext4_crypto.h b/fs/ext4/ext4_crypto.h
index 552424a..deecbe8 100644
--- a/fs/ext4/ext4_crypto.h
+++ b/fs/ext4/ext4_crypto.h
@@ -66,10 +66,17 @@
 #define EXT4_KEY_DESC_PREFIX "ext4:"
 #define EXT4_KEY_DESC_PREFIX_SIZE 5
 
+/* This is passed in from userspace into the kernel keyring */
 struct ext4_encryption_key {
-	uint32_t mode;
-	char raw[EXT4_MAX_KEY_SIZE];
-	uint32_t size;
+        __u32 mode;
+        char raw[EXT4_MAX_KEY_SIZE];
+        __u32 size;
+} __attribute__((__packed__));
+
+struct ext4_crypt_info {
+	unsigned char	ci_mode;
+	unsigned char	ci_size;
+	char		ci_raw[EXT4_MAX_KEY_SIZE];
 };
 
 #define EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL             0x00000001
@@ -125,7 +132,7 @@
 	u32 lim;
 	struct crypto_ablkcipher *ctfm;
 	struct crypto_hash *htfm;
-	struct ext4_encryption_key key;
+	struct ext4_crypt_info ci;
 	unsigned flags : 8;
 	unsigned has_valid_key : 1;
 	unsigned ctfm_key_is_ready : 1;