1 files changed, 5 insertions, 0 deletions
diff --git a/Swiften/Parser/LibXMLParser.h b/Swiften/Parser/LibXMLParser.h
index ba61ad9..cd73637 100644
--- a/Swiften/Parser/LibXMLParser.h
+++ b/Swiften/Parser/LibXMLParser.h
@@ -6,21 +6,26 @@
 
 #pragma once
 
 #include <libxml/parser.h>
 #include <boost/noncopyable.hpp>
 
 #include <Swiften/Parser/XMLParser.h>
 
 namespace Swift {
+	/**
+	 * Warning: This constructor is not thread-safe, because it depends on global state to
+	 * check whether it is initialized.
+	 */
 	class LibXMLParser : public XMLParser, public boost::noncopyable {
 		public:
 			LibXMLParser(XMLParserClient* client);
 			~LibXMLParser();
 
 			bool parse(const std::string& data);
 
 		private:
+			static bool initialized;
 			xmlSAXHandler handler_;
 			xmlParserCtxtPtr context_;
 	};
 }