diff --git a/src/include/lwip/api_msg.h b/src/include/lwip/api_msg.h
index 47af8205..446a8264 100644
--- a/src/include/lwip/api_msg.h
+++ b/src/include/lwip/api_msg.h
@@ -40,6 +40,7 @@
 #include "lwip/err.h"
 #include "lwip/sys.h"
 #include "lwip/igmp.h"
+#include "lwip/api.h"
 
 #ifdef __cplusplus
 extern "C" {