diff --git a/renderers.py b/renderers.py
index a41aace..2b39b1b 100644
--- a/renderers.py
+++ b/renderers.py
@@ -11,12 +11,12 @@ cols = {
 
 def tsv( *fields ):
 	# fields = [ '"' + str(f).replace('"','\\"') + '"' for f in fields ]
-	fields = [ s.encode('utf_8') for s in fields ]
+	fields = [ str(s).encode('utf_8') for s in fields ]
 	print( *fields, sep='\t' )
 
 def csv( *fields ):
 	fields = [ '"' + str(f).replace('"','\\"') + '"' for f in fields ]
-	fields = [ s.encode('utf_8') for s in fields ]
+	fields = [ str(s).encode('utf_8') for s in fields ]
 	print( *fields, sep=',' )
 
 def json( obj ):