diff --git a/src/libsystemd/sd-device/device-util.h b/src/libsystemd/sd-device/device-util.h
index ceb37496dd..bf86ddcbe3 100644
--- a/src/libsystemd/sd-device/device-util.h
+++ b/src/libsystemd/sd-device/device-util.h
@@ -7,6 +7,7 @@
 
 #include "sd-device.h"
 
+#include "alloc-util.h"
 #include "log.h"
 #include "macro.h"