--- a/TelepathyQt/client-registrar.cpp
+++ b/TelepathyQt/client-registrar.cpp
@@ -40,6 +40,8 @@
 #include <TelepathyQt/PendingComposite>
 #include <TelepathyQt/PendingReady>
 
+#include <unistd.h>
+
 namespace Tp
 {
 
--- a/TelepathyQt/stream-tube-client.cpp
+++ b/TelepathyQt/stream-tube-client.cpp
@@ -38,6 +38,8 @@
 #include <QAbstractSocket>
 #include <QHash>
 
+#include <unistd.h>
+
 namespace Tp
 {
 
--- a/TelepathyQt/stream-tube-server.cpp
+++ b/TelepathyQt/stream-tube-server.cpp
@@ -38,6 +38,8 @@
 #include <TelepathyQt/OutgoingStreamTubeChannel>
 #include <TelepathyQt/StreamTubeChannel>
 
+#include <unistd.h>
+
 namespace Tp
 {