diff --git a/src/librustrt/unwind.rs b/src/librustrt/unwind.rs
index 204128cf6be71..3a2abe70f3c29 100644
--- a/src/librustrt/unwind.rs
+++ b/src/librustrt/unwind.rs
@@ -399,8 +399,11 @@ pub mod eabi {
     use libunwind as uw;
     use libc::{c_void, c_int};
 
+    #[repr(C)]
     struct EXCEPTION_RECORD;
+    #[repr(C)]
     struct CONTEXT;
+    #[repr(C)]
     struct DISPATCHER_CONTEXT;
 
     #[repr(C)]