diff --git a/src/wayland/linuxdmabufv1clientbuffer.cpp b/src/wayland/linuxdmabufv1clientbuffer.cpp
index d85ecf0a1d..241e8dffe8 100644
--- a/src/wayland/linuxdmabufv1clientbuffer.cpp
+++ b/src/wayland/linuxdmabufv1clientbuffer.cpp
@@ -18,6 +18,7 @@
 #include <QTemporaryFile>
 #include <fcntl.h>
 #include <errno.h>
+#include <unistd.h>
 
 namespace KWaylandServer
 {