diff --git a/src/boot_loader_name.rs b/src/boot_loader_name.rs
index 7393e5bf..a83f6abc 100644
--- a/src/boot_loader_name.rs
+++ b/src/boot_loader_name.rs
@@ -1,6 +1,6 @@
 
 #[derive(Debug)]
-#[repr(packed)] // repr(C) would add unwanted padding before first_section
+#[repr(C, packed)] // only repr(C) would add unwanted padding before first_section
 pub struct BootLoaderNameTag {
     typ: u32,
     size: u32,
diff --git a/src/command_line.rs b/src/command_line.rs
index 86d0a5c0..fea57a02 100644
--- a/src/command_line.rs
+++ b/src/command_line.rs
@@ -1,6 +1,6 @@
 
 #[derive(Debug)]
-#[repr(packed)] // repr(C) would add unwanted padding before first_section
+#[repr(C, packed)] // only repr(C) would add unwanted padding before first_section
 pub struct CommandLineTag {
     typ: u32,
     size: u32,