diff --git a/src/sgfParser/property.py b/src/sgfParser/property.py
--- a/src/sgfParser/property.py
+++ b/src/sgfParser/property.py
@@ -42,7 +42,7 @@ class Property:
 		else:
 			# !! raise or log or ignore
 			# print('warning, unknown property "{0}" at position {1}'.format(name,start))
-			return choose(listOf(anything)(s, start), singleton(anything)(s, start))
+			return choose(listOf(anything), singleton(anything))(s,start)
 
 	@property
 	def type(self):