diff --git a/dbus/dbus-spawn.c b/dbus/dbus-spawn.c
index 653776b5..b95cad6e 100644
--- a/dbus/dbus-spawn.c
+++ b/dbus/dbus-spawn.c
@@ -39,6 +39,9 @@
 #include <errno.h>
 #endif
 #ifdef HAVE_SYSTEMD
+#ifdef HAVE_SYSLOG_H
+#include <syslog.h>
+#endif
 #include <systemd/sd-journal.h>
 #endif