diff --git a/ChangeLog b/ChangeLog
index 902e66556..9058cd7f2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-07-14  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/fs/zfs/zfs_lz4.c: Add missing packed attribute.
+
 2013-07-14  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/fs/zfs/zfs.c (nvlist_next_nvpair): Fix improper cast.
diff --git a/grub-core/fs/zfs/zfs_lz4.c b/grub-core/fs/zfs/zfs_lz4.c
index 4233a435e..530c63afb 100644
--- a/grub-core/fs/zfs/zfs_lz4.c
+++ b/grub-core/fs/zfs/zfs_lz4.c
@@ -99,13 +99,13 @@ typedef grub_size_t size_t;
 
 typedef struct _U16_S {
 	U16 v;
-} U16_S;
+} __attribute__ ((packed)) U16_S;
 typedef struct _U32_S {
 	U32 v;
-} U32_S;
+} __attribute__ ((packed)) U32_S;
 typedef struct _U64_S {
 	U64 v;
-} U64_S;
+} __attribute__ ((packed)) U64_S;
 
 #define	A64(x)	(((U64_S *)(x))->v)
 #define	A32(x)	(((U32_S *)(x))->v)