diff --git a/src/lib/remote_rom/backend/nic_ip/base.h b/src/lib/remote_rom/backend/nic_ip/base.h
index 44ac0d2..3cba018 100644
--- a/src/lib/remote_rom/backend/nic_ip/base.h
+++ b/src/lib/remote_rom/backend/nic_ip/base.h
@@ -27,7 +27,6 @@
 
 namespace Remote_rom {
 	using  Genode::Packet_descriptor;
-	using  Genode::env;
 	using  Net::Ethernet_frame;
 	using  Net::Ipv4_packet;
 	using  Net::Mac_address;
diff --git a/src/lib/remote_rom/backend/nic_ip/client.cc b/src/lib/remote_rom/backend/nic_ip/client.cc
index 0d2c6da..31ef12c 100644
--- a/src/lib/remote_rom/backend/nic_ip/client.cc
+++ b/src/lib/remote_rom/backend/nic_ip/client.cc
@@ -165,7 +165,7 @@ class Remote_rom::Backend_client :
 
 		void send_ack(Content_receiver const &recv);
 
-		void receive(Packet &packet, Size_guard &size_guard);
+		void receive(Packet &packet, Size_guard &size_guard) override;
 
 	public:
 
@@ -177,7 +177,7 @@ class Remote_rom::Backend_client :
 		{ }
 
 
-		void register_receiver(Rom_receiver_base *receiver)
+		void register_receiver(Rom_receiver_base *receiver) override
 		{
 			/* TODO support multiple receivers (ROM names) */
 			_content_receiver.register_receiver(receiver);
diff --git a/src/lib/remote_rom/backend/nic_ip/server.cc b/src/lib/remote_rom/backend/nic_ip/server.cc
index d302d18..757bb37 100644
--- a/src/lib/remote_rom/backend/nic_ip/server.cc
+++ b/src/lib/remote_rom/backend/nic_ip/server.cc
@@ -194,7 +194,7 @@ class Remote_rom::Backend_server :
 
 		void send_packet(Content_sender const &sender);
 
-		void receive(Packet &packet, Size_guard &);
+		void receive(Packet &packet, Size_guard &) override;
 
 	public:
 
@@ -206,11 +206,11 @@ class Remote_rom::Backend_server :
 		{ }
 
 
-		void register_forwarder(Rom_forwarder_base *forwarder)
+		void register_forwarder(Rom_forwarder_base *forwarder) override
 		{ _content_sender.register_forwarder(forwarder); }
 
 
-		void send_update()
+		void send_update() override
 		{
 			if (!_content_sender.content_size()) return;
 
diff --git a/src/proxy/remote_rom/client/main.cc b/src/proxy/remote_rom/client/main.cc
index d623887..8976de5 100644
--- a/src/proxy/remote_rom/client/main.cc
+++ b/src/proxy/remote_rom/client/main.cc
@@ -177,7 +177,7 @@ class Remote_rom::Root : public Genode::Root_component<Session_component>
 
 	protected:
 
-		Session_component *_create_session(const char *)
+		Session_component *_create_session(const char *) override
 		{
 			using namespace Genode;
 
@@ -236,10 +236,10 @@ struct Remote_rom::Main : public Rom_receiver_base
 		_backend.register_receiver(this);
 	}
 
-	const char* module_name()  const { return remotename; }
-	unsigned    content_hash() const { return rom_module.hash(); }
+	const char* module_name()  const override { return remotename; }
+	unsigned    content_hash() const override { return rom_module.hash(); }
 
-	char* start_new_content(unsigned hash, size_t len)
+	char* start_new_content(unsigned hash, size_t len) override
 	{
 		/* save expected hash */
 		/* TODO (optional) skip if we already have the same data */
@@ -248,7 +248,7 @@ struct Remote_rom::Main : public Rom_receiver_base
 		return rom_module.base(len);
 	}
 
-	void commit_new_content(bool abort=false)
+	void commit_new_content(bool abort=false) override
 	{
 		if (abort)
 			return;
diff --git a/src/proxy/remote_rom/server/main.cc b/src/proxy/remote_rom/server/main.cc
index 1807563..0bb4f1e 100644
--- a/src/proxy/remote_rom/server/main.cc
+++ b/src/proxy/remote_rom/server/main.cc
@@ -60,8 +60,8 @@ struct Remote_rom::Rom_forwarder : Rom_forwarder_base
 			update();
 		}
 
-		void start_transmission()  { _transmitting = true; }
-		void finish_transmission()
+		void start_transmission() override { _transmitting = true; }
+		void finish_transmission() override
 		{
 			_transmitting = false;
 
@@ -71,7 +71,7 @@ struct Remote_rom::Rom_forwarder : Rom_forwarder_base
 				update();
 		}
 
-		const char *module_name() const { return modulename; }
+		const char *module_name() const override { return modulename; }
 
 		void update()
 		{
@@ -85,7 +85,7 @@ struct Remote_rom::Rom_forwarder : Rom_forwarder_base
 			/* refresh dataspace if valid */
 			_rom.update();
 
-			if (_rom.is_valid()) {
+			if (_rom.valid()) {
 				_current_hash = cksum(_rom.local_addr<char>(), content_size());
 
 				/* trigger backend_server */
@@ -93,14 +93,14 @@ struct Remote_rom::Rom_forwarder : Rom_forwarder_base
 			}
 		}
 
-		unsigned content_hash() const
+		unsigned content_hash() const override
 		{
 			return _current_hash;
 		}
 
-		size_t content_size() const
+		size_t content_size() const override
 		{
-			if (_rom.is_valid()) {
+			if (_rom.valid()) {
 				if (binary)
 					return _rom.size();
 				else
@@ -110,9 +110,9 @@ struct Remote_rom::Rom_forwarder : Rom_forwarder_base
 			return 0;
 		}
 
-		size_t transfer_content(char *dst, size_t dst_len, size_t offset=0) const
+		size_t transfer_content(char *dst, size_t dst_len, size_t offset=0) const override
 		{
-			if (_rom.is_valid()) {
+			if (_rom.valid()) {
 				size_t const len = Genode::min(dst_len, content_size()-offset);
 				Genode::memcpy(dst, _rom.local_addr<char>() + offset, len);
 				/* clear remaining buffer to prevent data leakage */