1 files changed, 2 insertions, 1 deletions

diff --git a/osdep.h b/osdep.h
index 32ee94b..4b4aad4 100644
--- a/osdep.h
+++ b/osdep.h
@@ -2,6 +2,7 @@
 #define QEMU_OSDEP_H
 
 #include <stdarg.h>
+#include <stddef.h>
 #ifdef __OpenBSD__
 #include <sys/types.h>
 #include <sys/signal.h>
@@ -27,7 +28,7 @@
 #define unlikely(x)   __builtin_expect(!!(x), 0)
 #endif
 
-#ifndef offsetof
+#ifdef CONFIG_NEED_OFFSETOF
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
 #endif
 #ifndef container_of