diff --git a/addons/0.documentViewer.QTextBrowser.py b/addons/0.documentViewer.QTextBrowser.py
index 5d087df..6800f4c 100644
--- a/addons/0.documentViewer.QTextBrowser.py
+++ b/addons/0.documentViewer.QTextBrowser.py
@@ -43,7 +43,10 @@ class browserDoc(QTextBrowser):
 			
 			self.output += "<" +tag
 			for attr in attrs:
-				self.output += ' ' +html.escape(attr[0])+ '="' +html.escape(attr[1])+ '"'
+				if attr[1] != None:
+					self.output += ' ' +html.escape(attr[0])+ '="' +html.escape(attr[1])+ '"'
+				else:
+					self.output += ' ' +html.escape(attr[0])
 			self.output += ">"
 		
 		def handle_endtag(self,tag):