diff --git a/src/nodeinfo.c b/src/nodeinfo.c
index 6ccada55bf..77ea15502a 100644
--- a/src/nodeinfo.c
+++ b/src/nodeinfo.c
@@ -33,6 +33,7 @@
 #include "conf/domain_conf.h"
 #include <fcntl.h>
 #include <sys/ioctl.h>
+#include <unistd.h>
 
 #if HAVE_LINUX_KVM_H
 # include <linux/kvm.h>
diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index 4b33770bde..a714b84c97 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -24,6 +24,8 @@
 #ifndef __QEMUD_CONF_H
 # define __QEMUD_CONF_H
 
+# include <unistd.h>
+
 # include "virebtables.h"
 # include "internal.h"
 # include "capabilities.h"
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index a07f3c255b..e39c4d1ab3 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -38,6 +38,7 @@
 #include <sys/types.h>
 #include <signal.h>
 #include <dirent.h>
+#include <unistd.h>
 
 #define __VIR_CGROUP_ALLOW_INCLUDE_PRIV_H__
 #include "vircgrouppriv.h"
diff --git a/src/util/vircommand.c b/src/util/vircommand.c
index 1993bc658d..fe7bf34cb8 100644
--- a/src/util/vircommand.c
+++ b/src/util/vircommand.c
@@ -29,6 +29,7 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <fcntl.h>
+#include <unistd.h>
 
 #if WITH_CAPNG
 # include <cap-ng.h>
diff --git a/tools/virt-login-shell.c b/tools/virt-login-shell.c
index ceb271d070..ec759dcb0d 100644
--- a/tools/virt-login-shell.c
+++ b/tools/virt-login-shell.c
@@ -29,6 +29,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #include "internal.h"
 #include "virerror.h"