diff --git a/extras/volume_id/libvolume_id/volume_id.h b/extras/volume_id/libvolume_id/volume_id.h
index f2f3a0d0065..517d382540f 100644
--- a/extras/volume_id/libvolume_id/volume_id.h
+++ b/extras/volume_id/libvolume_id/volume_id.h
@@ -12,6 +12,7 @@
 #define _VOLUME_ID_H_
 
 #include <stdint.h>
+#include <stddef.h>
 
 #define VOLUME_ID_VERSION		53