diff --git a/src/mapgen.h b/src/mapgen.h
index cfecb3206..cf2120a7a 100644
--- a/src/mapgen.h
+++ b/src/mapgen.h
@@ -136,6 +136,7 @@ struct MapgenFactory {
 
 class GenElement {
 public:
+	virtual ~GenElement() {}
 	u32 id;
 	std::string name;
 };