diff --git a/imxrt-ral/imxrtral.py b/imxrt-ral/imxrtral.py
index 26fa8973..4c4a24de 100644
--- a/imxrt-ral/imxrtral.py
+++ b/imxrt-ral/imxrtral.py
@@ -768,6 +768,7 @@ def to_rust_register_block(self):
             address += register.size // 8
         lines = "\n".join(lines)
         return f"""
+        #[repr(C)]
         pub struct RegisterBlock {{
             {lines}
         }}"""