diff --git a/src/jconf.h b/src/jconf.h
index 77512e4f..3c33e8c2 100644
--- a/src/jconf.h
+++ b/src/jconf.h
@@ -26,7 +26,6 @@
 #define MAX_REMOTE_NUM 10
 #define MAX_DSCP_NUM 64
 #define MAX_CONF_SIZE 128 * 1024
-#define MAX_DNS_NUM 4
 #define MAX_CONNECT_TIMEOUT 10
 #define MAX_REQUEST_TIMEOUT 60
 #define MIN_UDP_TIMEOUT 10