1 files changed, 3 insertions, 4 deletions
diff --git a/src/engine/Stateful.hpp b/src/engine/Stateful.hpp
index 4294221..6657aff 100644
--- a/src/engine/Stateful.hpp
+++ b/src/engine/Stateful.hpp
@@ -47,7 +47,7 @@ public:
 	static uint64_t next_id() { return _next_id++; }
 
 protected:
-	Stateful(uint64_t id) : _id(id) {}
+	explicit Stateful(uint64_t id) : _id(id) {}
 
 private:
 	static uint64_t _next_id;
@@ -56,11 +56,10 @@ private:
 	mutable Sord::Node _rdf_id;
 };
 
-class StatefulKey
-	: public Stateful
+class StatefulKey : public Stateful
 {
 public:
-	StatefulKey(uint64_t id) : Stateful(id) {}
+	explicit StatefulKey(uint64_t id) : Stateful(id) {}
 
 	void write_state(Sord::Model& model) {}
 };