diff --git a/xen/include/asm-x86/guest_access.h b/xen/include/asm-x86/guest_access.h
index 2b429c2..7e95da3 100644
--- a/xen/include/asm-x86/guest_access.h
+++ b/xen/include/asm-x86/guest_access.h
@@ -47,7 +47,7 @@
 
 /* Cast a guest handle to the specified type of handle. */
 #define guest_handle_cast(hnd, type) ({         \
-    type *_x = (hnd).p;                         \
+    type *_x = (type *)(hnd).p;                 \
     (XEN_GUEST_HANDLE(type)) { _x };            \
 })