diff --git a/src/plugins/input/tcp/src/IpfixDecoder.cpp b/src/plugins/input/tcp/src/IpfixDecoder.cpp
index 8ef5094b..934bfa5b 100644
--- a/src/plugins/input/tcp/src/IpfixDecoder.cpp
+++ b/src/plugins/input/tcp/src/IpfixDecoder.cpp
@@ -24,8 +24,6 @@
 
 namespace tcp_in {
 
-using namespace std;
-
 DecodeBuffer &IpfixDecoder::decode() {
     while (!m_decoded.enough_data()) {
         if (!read_header()) {
@@ -38,7 +36,7 @@ DecodeBuffer &IpfixDecoder::decode() {
     }
 
     if (m_decoded.is_eof_reached() && m_part_readed.size() != 0) {
-        throw runtime_error("Received incomplete message.");
+        throw std::runtime_error("Received incomplete message.");
     }
 
     return m_decoded;
diff --git a/src/plugins/input/tcp/src/IpfixDecoder.hpp b/src/plugins/input/tcp/src/IpfixDecoder.hpp
index 93fad590..987a8f54 100644
--- a/src/plugins/input/tcp/src/IpfixDecoder.hpp
+++ b/src/plugins/input/tcp/src/IpfixDecoder.hpp
@@ -19,6 +19,7 @@
 
 namespace tcp_in {
 
+/** Identifies data for which this decoder should be used. */
 constexpr uint16_t IPFIX_MAGIC = 10;
 
 /** Decoder for basic IPFX data. */
@@ -48,6 +49,7 @@ class IpfixDecoder : public Decoder {
     DecodeBuffer m_decoded;
 
     ByteVector m_part_readed;
+    /** Final size of the whole IPFIX message. When 0 IPIFX header is not fully read. */
     size_t m_msg_size;
 };