diff --git a/interface.cpp b/interface.cpp
index 5f496d0..1b9efab 100644
--- a/interface.cpp
+++ b/interface.cpp
@@ -11,6 +11,7 @@ extern "C" {
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
+#include <net/if.h>
 }
 
 #include "interface.h"