diff --git a/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc b/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc
--- a/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc
+++ b/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc
@@ -15,6 +15,7 @@
 #include <sys/ioctl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include <unistd.h>
 
 #include <cstring>