diff --git a/drivers/staging/android/binder.h b/drivers/staging/android/binder.h
index edab2491a1b7..6515dd2f3552 100644
--- a/drivers/staging/android/binder.h
+++ b/drivers/staging/android/binder.h
@@ -86,7 +86,7 @@ struct binder_version {
 
 #define BINDER_WRITE_READ		_IOWR('b', 1, struct binder_write_read)
 #define	BINDER_SET_IDLE_TIMEOUT		_IOW('b', 3, __s64)
-#define	BINDER_SET_MAX_THREADS		_IOW('b', 5, size_t)
+#define	BINDER_SET_MAX_THREADS		_IOW('b', 5, __u32)
 #define	BINDER_SET_IDLE_PRIORITY	_IOW('b', 6, __s32)
 #define	BINDER_SET_CONTEXT_MGR		_IOW('b', 7, __s32)
 #define	BINDER_THREAD_EXIT		_IOW('b', 8, __s32)