diff --git a/src/regs.rs b/src/regs.rs
index 4a0265f..e7ee651 100644
--- a/src/regs.rs
+++ b/src/regs.rs
@@ -16,7 +16,7 @@ pub trait Register {
 #[macro_export]
 macro_rules! register {
     ($mod_name: ident, $struct_name: ident, $inner: ty) => (
-        #[repr(packed)]
+        #[repr(C)]
         pub struct $struct_name {
             inner: RW<$inner>,
         }
diff --git a/src/uart/regs.rs b/src/uart/regs.rs
index b9ea604..09b2d36 100644
--- a/src/uart/regs.rs
+++ b/src/uart/regs.rs
@@ -11,7 +11,7 @@ pub enum ParityMode {
     ForceTo1   = 0b011,
 }
 
-#[repr(packed)]
+#[repr(C)]
 pub struct RegisterBlock {
     control: Control,
     mode: Mode,