#ifndef CJET_CONFIG_H
#define CJET_CONFIG_H

#define SERVER_PORT	11122
#define LISTEN_BACKLOG 40
/*
 * It is somehow beneficial if this size is 32 bit aligned.
 */
#define MAX_MESSAGE_SIZE 512
#define WRITE_BUFFER_CHUNK 512
#define MAX_WRITE_BUFFER_SIZE (10 * (WRITE_BUFFER_CHUNK))

/* Linux specific configs */
#define MAX_EPOLL_EVENTS 100

#endif

#ifndef CJET_CONFIG_H
#define CJET_CONFIG_H

#define SERVER_PORT	11122
#define LISTEN_BACKLOG 40
/*
 * It is somehow beneficial if this size is 32 bit aligned.
 */
#define MAX_MESSAGE_SIZE 512
#define WRITE_BUFFER_CHUNK 512
#define MAX_WRITE_BUFFER_SIZE 10 * WRITE_BUFFER_CHUNK

/* Linux specific configs */
#define MAX_EPOLL_EVENTS 100

#endif

--- 
+++ 
@@ -8,7 +8,7 @@
  */
 #define MAX_MESSAGE_SIZE 512
 #define WRITE_BUFFER_CHUNK 512
-#define MAX_WRITE_BUFFER_SIZE 10 * WRITE_BUFFER_CHUNK
+#define MAX_WRITE_BUFFER_SIZE (10 * (WRITE_BUFFER_CHUNK))
 
 /* Linux specific configs */
 #define MAX_EPOLL_EVENTS 100
Use some paranthesis around macro parameters.
