diff --git a/common/ip_util.cpp b/common/ip_util.cpp
index 59e9f7d60..1098ecf18 100644
--- a/common/ip_util.cpp
+++ b/common/ip_util.cpp
@@ -21,7 +21,6 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
-#include <unistd.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>