diff --git a/src/network/serverpackethandler.cpp b/src/network/serverpackethandler.cpp
index 6f17d666..7e9495d1 100644
--- a/src/network/serverpackethandler.cpp
+++ b/src/network/serverpackethandler.cpp
@@ -952,7 +952,7 @@ void Server::handleCommand_Respawn(NetworkPacket* pkt)
 	// the previous addition has been successfully removed
 }
 
-bool Server::checkInteractDistance(RemotePlayer *player, const f32 d, const std::string what)
+bool Server::checkInteractDistance(RemotePlayer *player, const f32 d, const std::string &what)
 {
 	PlayerSAO *playersao = player->getPlayerSAO();
 	const InventoryList *hlist = playersao->getInventory()->getList("hand");
diff --git a/src/server.h b/src/server.h
index 0a3e4807..5949d9bf 100644
--- a/src/server.h
+++ b/src/server.h
@@ -477,7 +477,7 @@ private:
 	void RespawnPlayer(session_t peer_id);
 	void DeleteClient(session_t peer_id, ClientDeletionReason reason);
 	void UpdateCrafting(RemotePlayer *player);
-	bool checkInteractDistance(RemotePlayer *player, const f32 d, const std::string what);
+	bool checkInteractDistance(RemotePlayer *player, const f32 d, const std::string &what);
 
 	void handleChatInterfaceEvent(ChatEvent *evt);