sio.h: include opt.h for checking #ifndef's

2016-07-29 08:01:41 +02:00
parent 90fba8773f
commit b7da649944
1 changed files with 1 additions and 0 deletions
--- a/src/include/lwip/sio.h
+++ b/src/include/lwip/sio.h
@@ -36,6 +36,7 @@
 #define SIO_H

 #include "lwip/arch.h"
+#include "lwip/opt.h"

 #ifdef __cplusplus
 extern "C" {