diff --git a/src/sc.h b/src/sc.h
index daf01b0..c2008fa 100644
--- a/src/sc.h
+++ b/src/sc.h
@@ -50,7 +50,7 @@ public:
 	}
 
 	void load_key_vector (const std::vector<byte>&K) {
-		load_key (& (K[0]), & (K[K.size()]));
+		load_key (K.data(), K.data() + K.size());
 	}
 
 	typedef std::map<std::string, factoryof<streamcipher>*> suite_t;