--- stardict/dict/stardict-plugins/stardict-wordnet-plugin/scene.h
+++ stardict/dict/stardict-plugins/stardict-wordnet-plugin/scene.h
@@ -28,6 +28,7 @@
 #include "partic.h"
 #include "spring.h"
 
+#include <cstddef>
 #include <vector>
 using namespace std;