diff --git a/src/xwl/xwaylandsocket.cpp b/src/xwl/xwaylandsocket.cpp
index 23759104ae..c588b67e3f 100644
--- a/src/xwl/xwaylandsocket.cpp
+++ b/src/xwl/xwaylandsocket.cpp
@@ -11,6 +11,7 @@
 #include <QDir>
 #include <QFile>
 
+#include <errno.h>
 #include <signal.h>
 #include <sys/socket.h>
 #include <sys/un.h>