diff --git a/src/journal/journalctl-show.c b/src/journal/journalctl-show.c
index 371d6957cf..bf8f9bdc63 100644
--- a/src/journal/journalctl-show.c
+++ b/src/journal/journalctl-show.c
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <unistd.h>
+
 #include "sd-event.h"
 
 #include "fileio.h"
diff --git a/src/journal/journalctl-util.c b/src/journal/journalctl-util.c
index f8f5ac61a9..575488bee1 100644
--- a/src/journal/journalctl-util.c
+++ b/src/journal/journalctl-util.c
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <unistd.h>
+
 #include "journal-util.h"
 #include "journalctl.h"
 #include "journalctl-util.h"