diff --git a/driver/io-unix.cpp b/driver/io-unix.cpp
index 04a92a0..7f902c3 100644
--- a/driver/io-unix.cpp
+++ b/driver/io-unix.cpp
@@ -212,16 +212,15 @@ Conveyor<Own<IoStream>> UnixNetworkAddress::connect() {
 	return Conveyor<Own<IoStream>>{std::move(io_stream)};
 }
 
-Own<Datagram> UnixNetworkAddress::datagram(){
-	SAW_ASSERT(addresses.size() > 0){
-		return nullptr;
-	}
+Own<Datagram> UnixNetworkAddress::datagram() {
+	SAW_ASSERT(addresses.size() > 0) { return nullptr; }
 
 	int fd = addresses.front().socket(SOCK_DGRAM);
 
 	int optval = 1;
-	int rc = ::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
-	SAW_ASSERT(rc == 0){
+	int rc =
+		::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
+	SAW_ASSERT(rc == 0) {
 		::close(fd);
 		return nullptr;
 	}
diff --git a/source/forstio/error.h b/source/forstio/error.h
index e2fda88..dc4ae96 100644
--- a/source/forstio/error.h
+++ b/source/forstio/error.h
@@ -91,11 +91,11 @@ public:
 	virtual ~ErrorOrValue() = default;
 
 	template <typename T> ErrorOr<UnfixVoid<T>> &as() {
-		return dynamic_cast<ErrorOr<UnfixVoid<T>> &>(*this);
+		return static_cast<ErrorOr<UnfixVoid<T>> &>(*this);
 	}
 
 	template <typename T> const ErrorOr<UnfixVoid<T>> &as() const {
-		return dynamic_cast<const ErrorOr<UnfixVoid<T>> &>(*this);
+		return static_cast<const ErrorOr<UnfixVoid<T>> &>(*this);
 	}
 };
 
diff --git a/source/forstio/io.h b/source/forstio/io.h
index 24cde7f..2e719d7 100644
--- a/source/forstio/io.h
+++ b/source/forstio/io.h
@@ -92,18 +92,20 @@ public:
 	virtual Conveyor<Own<IoStream>> accept() = 0;
 };
 
+class NetworkAddress;
 /**
- * Datagram class. Bound to a local address it is able to receive inbound datagram messages
- * and send them as well as long as an address is provided as well
+ * Datagram class. Bound to a local address it is able to receive inbound
+ * datagram messages and send them as well as long as an address is provided as
+ * well
  */
 class Datagram {
 public:
 	virtual ~Datagram() = default;
 
-	virtual void write(void* buffer, size_t length, NetworkAddress& dest) = 0;
+	virtual void write(void *buffer, size_t length, NetworkAddress &dest) = 0;
 	virtual Conveyor<size_t> writeDone() = 0;
 
-	virtual void read(void* buffer, size_t min_length, size_t max_length) = 0;
+	virtual void read(void *buffer, size_t min_length, size_t max_length) = 0;
 	virtual Conveyor<size_t> readDone() = 0;
 };
 
diff --git a/source/forstio/tls/tls.cpp b/source/forstio/tls/tls.cpp
index ffe4f1c..c1c8bca 100644
--- a/source/forstio/tls/tls.cpp
+++ b/source/forstio/tls/tls.cpp
@@ -209,6 +209,11 @@ Conveyor<Own<IoStream>> TlsNetworkAddress::connect() {
 	return caf.conveyor.attach(std::move(helper));
 }
 
+Own<Datagram> TlsNetworkAddress::datagram(){
+	///@unimplemented
+	return nullptr;
+}
+
 static ssize_t forst_tls_push_func(gnutls_transport_ptr_t p, const void *data,
 						 size_t size) {
 	IoStream *stream = reinterpret_cast<IoStream *>(p);
diff --git a/source/forstio/tls/tls.h b/source/forstio/tls/tls.h
index 723538b..8dab7a8 100644
--- a/source/forstio/tls/tls.h
+++ b/source/forstio/tls/tls.h
@@ -46,6 +46,8 @@ public:
 
 	Conveyor<Own<IoStream>> connect() override;
 
+	Own<Datagram> datagram() override;
+
 	std::string toString() const override;
 
 	const std::string &address() const override;