diff --git a/include/libtorrent/aux_/session_settings.hpp b/include/libtorrent/aux_/session_settings.hpp
index b912263f9..ddcff312b 100644
--- a/include/libtorrent/aux_/session_settings.hpp
+++ b/include/libtorrent/aux_/session_settings.hpp
@@ -68,7 +68,7 @@ namespace libtorrent { namespace aux {
 		{ return get<bool>(m_bools, name, settings_pack::bool_type_base); }
 
 		session_settings();
-		session_settings(settings_pack const&);
+		explicit session_settings(settings_pack const&);
 
 	private:
 
diff --git a/include/libtorrent/aux_/session_udp_sockets.hpp b/include/libtorrent/aux_/session_udp_sockets.hpp
index 54a3b02d9..9c03e89b1 100644
--- a/include/libtorrent/aux_/session_udp_sockets.hpp
+++ b/include/libtorrent/aux_/session_udp_sockets.hpp
@@ -74,7 +74,7 @@ namespace libtorrent { namespace aux {
 		transport const ssl;
 	};
 
-	// sockets used for outoing utp connections
+	// sockets used for outgoing utp connections
 	struct TORRENT_EXTRA_EXPORT outgoing_sockets
 	{
 		// partitions sockets based on whether they match one of the given endpoints
@@ -94,7 +94,7 @@ namespace libtorrent { namespace aux {
 		std::vector<std::shared_ptr<outgoing_udp_socket>> sockets;
 	private:
 		// round-robin index into sockets
-		// one dimention for IPv4/IPv6 and a second for SSL/non-SSL
+		// one dimension for IPv4/IPv6 and a second for SSL/non-SSL
 		mutable std::array<std::array<std::uint8_t, 2>, 2> index = {{ {{0, 0}}, {{0, 0}} }};
 	};
 
diff --git a/include/libtorrent/gzip.hpp b/include/libtorrent/gzip.hpp
index a2473ec1f..621d29b60 100644
--- a/include/libtorrent/gzip.hpp
+++ b/include/libtorrent/gzip.hpp
@@ -134,4 +134,3 @@ struct is_error_condition_enum<libtorrent::gzip_errors::error_code_enum>
 } }
 
 #endif
-
diff --git a/src/gzip.cpp b/src/gzip.cpp
index f2b2ba9ca..29e45d1f5 100644
--- a/src/gzip.cpp
+++ b/src/gzip.cpp
@@ -34,7 +34,6 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/puff.hpp"
 #include "libtorrent/gzip.hpp"
 
-#include <vector>
 #include <string>
 
 namespace {
@@ -180,8 +179,7 @@ namespace {
 	}
 	} // anonymous namespace
 
-	TORRENT_EXTRA_EXPORT void inflate_gzip(
-		span<char const> in
+	void inflate_gzip(span<char const> in
 		, std::vector<char>& buffer
 		, int maximum_size
 		, error_code& ec)
@@ -264,4 +262,3 @@ namespace {
 	}
 
 }
-
diff --git a/src/stat_cache.cpp b/src/stat_cache.cpp
index 42998d505..14a937cc9 100644
--- a/src/stat_cache.cpp
+++ b/src/stat_cache.cpp
@@ -37,10 +37,10 @@ POSSIBILITY OF SUCH DAMAGE.
 
 namespace libtorrent {
 
-	stat_cache::stat_cache() {}
+	stat_cache::stat_cache() = default;
 	stat_cache::~stat_cache() = default;
 
-	void stat_cache::set_cache(file_index_t const i, std::int64_t size)
+	void stat_cache::set_cache(file_index_t const i, std::int64_t const size)
 	{
 		if (i >= m_stat_cache.end_index())
 			m_stat_cache.resize(static_cast<int>(i) + 1, not_in_cache);
diff --git a/src/storage_utils.cpp b/src/storage_utils.cpp
index a11784175..298409bfd 100644
--- a/src/storage_utils.cpp
+++ b/src/storage_utils.cpp
@@ -152,7 +152,7 @@ namespace libtorrent { namespace aux {
 		{
 			file_bytes_left = bytes_left;
 			if (file_offset + file_bytes_left > files.file_size(file_index))
-				file_bytes_left = (std::max)(static_cast<int>(files.file_size(file_index) - file_offset), 0);
+				file_bytes_left = std::max(static_cast<int>(files.file_size(file_index) - file_offset), 0);
 
 			// there are no bytes left in this file, move to the next one
 			// this loop skips over empty files
@@ -168,7 +168,7 @@ namespace libtorrent { namespace aux {
 
 				file_bytes_left = bytes_left;
 				if (file_offset + file_bytes_left > files.file_size(file_index))
-					file_bytes_left = (std::max)(static_cast<int>(files.file_size(file_index) - file_offset), 0);
+					file_bytes_left = std::max(static_cast<int>(files.file_size(file_index) - file_offset), 0);
 			}
 
 			// make a copy of the iovec array that _just_ covers the next
diff --git a/src/xml_parse.cpp b/src/xml_parse.cpp
index 6af9838e2..d2f4ea5d3 100644
--- a/src/xml_parse.cpp
+++ b/src/xml_parse.cpp
@@ -34,11 +34,10 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "libtorrent/xml_parse.hpp"
 #include "libtorrent/string_util.hpp"
-#include "libtorrent/string_view.hpp"
 
 namespace libtorrent {
 
-	TORRENT_EXTRA_EXPORT void xml_parse(string_view input
+	void xml_parse(string_view input
 		, std::function<void(int, string_view, string_view)> callback)
 	{
 		char const* p = input.data();