diff --git a/src/usr/hdat/hdatutil.H b/src/usr/hdat/hdatutil.H
index a509a1febe7..39400343b5c 100755
--- a/src/usr/hdat/hdatutil.H
+++ b/src/usr/hdat/hdatutil.H
@@ -150,7 +150,7 @@ typedef struct{
     uint8_t  version;   // Version of the structure = 0x01 start
     uint8_t  config;    // Configuration specifier : redbud=0x01,sequoia=0x02
     uint8_t  reserved[249];  // keyword is 255 bytes long
-}hdatNVKwdStruct_t;
+}__attribute__ ((packed)) hdatNVKwdStruct_t;
 
 enum hdatSMPLinkUsage
 {