diff --git a/graphics/fbcond/src/display.rs b/graphics/fbcond/src/display.rs
index 96ea7a144a..01f58ed2c8 100644
--- a/graphics/fbcond/src/display.rs
+++ b/graphics/fbcond/src/display.rs
@@ -13,7 +13,7 @@ use syscall::{O_CLOEXEC, O_NONBLOCK, O_RDWR};
 
 // Keep synced with vesad
 #[derive(Clone, Copy)]
-#[repr(packed)]
+#[repr(C, packed)]
 pub struct SyncRect {
     pub x: i32,
     pub y: i32,
diff --git a/graphics/vesad/src/screen.rs b/graphics/vesad/src/screen.rs
index 2369aafae8..d77c095c9b 100644
--- a/graphics/vesad/src/screen.rs
+++ b/graphics/vesad/src/screen.rs
@@ -9,7 +9,7 @@ use crate::display::OffscreenBuffer;
 
 // Keep synced with orbital
 #[derive(Clone, Copy)]
-#[repr(packed)]
+#[repr(C, packed)]
 pub struct SyncRect {
     pub x: i32,
     pub y: i32,