diff --git a/lib/libwebsockets.h b/lib/libwebsockets.h
index ff0ca338..edea1a26 100644
--- a/lib/libwebsockets.h
+++ b/lib/libwebsockets.h
@@ -23,8 +23,8 @@
 #define LIBWEBSOCKET_H_3060898B846849FF9F88F5DB59B5950C
 
 #ifdef __cplusplus
-extern "C" {
 #include <cstddef>
+extern "C" {
 #endif
 	
 #ifdef CMAKE_BUILD