diff --git a/lib/efi_selftest/efi_selftest_snp.c b/lib/efi_selftest/efi_selftest_snp.c
index b00c76c2f17..290ed3a28f2 100644
--- a/lib/efi_selftest/efi_selftest_snp.c
+++ b/lib/efi_selftest/efi_selftest_snp.c
@@ -43,7 +43,7 @@ struct dhcp_hdr {
 	u8 chaddr[16];
 	u8 sname[64];
 	u8 file[128];
-};
+} __packed;
 
 /*
  * Message type option.