diff --git a/dom/plugins/ipc/PluginModuleChild.cpp b/dom/plugins/ipc/PluginModuleChild.cpp
index 4d002dae504..504f8206f48 100644
--- a/dom/plugins/ipc/PluginModuleChild.cpp
+++ b/dom/plugins/ipc/PluginModuleChild.cpp
@@ -5,6 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #ifdef MOZ_WIDGET_QT
+#include <unistd.h> // for _exit()
 #include <QtCore/QTimer>
 #include "nsQAppInstance.h"
 #include "NestedLoopTimer.h"
diff --git a/ipc/chromium/src/chrome/common/ipc_channel_posix.cc b/ipc/chromium/src/chrome/common/ipc_channel_posix.cc
index b86c8327996..0d2e7653137 100644
--- a/ipc/chromium/src/chrome/common/ipc_channel_posix.cc
+++ b/ipc/chromium/src/chrome/common/ipc_channel_posix.cc
@@ -7,6 +7,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
+#include <unistd.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/stat.h>