diff --git a/include/fusd_msg.h b/include/fusd_msg.h
index 9a7ebd7..581ee63 100755
--- a/include/fusd_msg.h
+++ b/include/fusd_msg.h
@@ -81,6 +81,8 @@
 /* other constants */
 #define FUSD_MSG_MAGIC      0x7a6b93cd
 
+#pragma pack(1)
+
 /* user->kernel: register a device */
 typedef struct {
   char name[FUSD_MAX_NAME_LENGTH+1];
@@ -148,4 +150,6 @@ typedef struct {
   int num_open;
 } fusd_status_t;
 
+#pragma pack()
+
 #endif /* __FUSD_MSG_H__ */