Index: src/z3c/rml/stylesheet.py
===================================================================
--- src/z3c/rml/stylesheet.py	(revision 129885)
+++ src/z3c/rml/stylesheet.py	(working copy)
@@ -500,7 +500,7 @@
     def process(self):
         name = self.getAttributeValues(select=('kind',), valuesOnly=True)[0]
         args = [name]
-        args += self.getAttributeValues(ignore=('kind',), valuesOnly=True)
+        args += self.getAttributeValues(ignore=('kind',), valuesOnly=True, includeMissing=True)
         self.parent.style.add(*args)
 
 class IBlockTableStyle(interfaces.IRMLDirectiveSignature):