diff --git a/Userland/ifconfig.cpp b/Userland/ifconfig.cpp
index a67b7e1cf1..92b297a86e 100644
--- a/Userland/ifconfig.cpp
+++ b/Userland/ifconfig.cpp
@@ -4,6 +4,7 @@
 #include <AK/Types.h>
 #include <LibCore/CFile.h>
 #include <net/if.h>
+#include <netinet/in.h>
 #include <stdio.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>