diff --git a/[refs] b/[refs]
index 5feddd9579c1..3d650e29b35e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8bbde0e6d52265158ee9625f383500c1a7d09ba9
+refs/heads/master: 181ae4005d0a4010802be534d929b38c42b9ac06
diff --git a/trunk/arch/um/drivers/cow_user.c b/trunk/arch/um/drivers/cow_user.c
index 0ec4052db9c5..6ab852bfcd3a 100644
--- a/trunk/arch/um/drivers/cow_user.c
+++ b/trunk/arch/um/drivers/cow_user.c
@@ -100,7 +100,7 @@ struct cow_header_v3_broken {
 	__u32 alignment;
 	__u32 cow_format;
 	char backing_file[PATH_LEN_V3];
-};
+} __attribute__((packed));
 
 /* COW format definitions - for now, we have only the usual COW bitmap */
 #define COW_BITMAP 0