diff --git a/src/bt_peer_connection.cpp b/src/bt_peer_connection.cpp
index 28137db84..923ea10fa 100644
--- a/src/bt_peer_connection.cpp
+++ b/src/bt_peer_connection.cpp
@@ -739,7 +739,6 @@ namespace {
 		ptr += 20;
 
 		std::memcpy(ptr, m_our_peer_id.data(), 20);
-		ptr += 20;
 
 #ifndef TORRENT_DISABLE_LOGGING
 		if (should_log(peer_log_alert::outgoing))
diff --git a/src/torrent_info.cpp b/src/torrent_info.cpp
index ca5cd7c94..f2c000094 100644
--- a/src/torrent_info.cpp
+++ b/src/torrent_info.cpp
@@ -153,6 +153,7 @@ namespace libtorrent {
 			UTF8 sequence[5];
 			UTF8* start = sequence;
 			res = ConvertUTF32toUTF8(const_cast<const UTF32**>(&cp), cp + 1, &start, start + 5, lenientConversion);
+			TORRENT_UNUSED(res);
 			TORRENT_ASSERT(res == conversionOK);
 
 			for (int i = 0; i < std::min(5, int(start - sequence)); ++i)
diff --git a/src/xml_parse.cpp b/src/xml_parse.cpp
index ad24a7b20..e3262713d 100644
--- a/src/xml_parse.cpp
+++ b/src/xml_parse.cpp
@@ -113,7 +113,6 @@ namespace libtorrent {
 			{
 				start += 3;
 				callback(xml_comment, {start, std::size_t(tag_name_end - start - 2)}, {});
-				tag_end = p - 2;
 				continue;
 			}
 			else