diff --git a/src/GF/CFGM/PrintCFGrammar.hs b/src/GF/CFGM/PrintCFGrammar.hs
index f073893b1..f27eddb1a 100644
--- a/src/GF/CFGM/PrintCFGrammar.hs
+++ b/src/GF/CFGM/PrintCFGrammar.hs
@@ -7,16 +7,21 @@ import GFC
 import Modules
 import qualified ConvertGrammar as Cnv
 import qualified PrintParser as Prt
+import ErrM
 
 import List (intersperse)
-import Maybe (listToMaybe, fromMaybe)
+import Maybe (listToMaybe, maybe)
 
 -- FIXME: fix warning about bad -printer= value
 
 prCanonAsCFGM :: CanonGrammar -> String
 prCanonAsCFGM gr = unlines $ map (uncurry (prLangAsCFGM gr)) xs 
     where 
-    xs = [(i,getFlag fs "startcat") | (i,ModMod (Module{mtype=MTConcrete _,flags=fs})) <- modules gr]
+    cncs = maybe [] (allConcretes gr) (greatestAbstract gr)
+    cncms = map (\i -> (i,fromOk (lookupModule gr i))) cncs
+    fromOk (Ok x) = x
+    fromOk (Bad y) = error y
+    xs = [(i,getFlag fs "startcat") | (i,ModMod (Module{flags=fs})) <- cncms]
 
 -- FIXME: need to look in abstract module too
 getFlag :: [Flag] -> String -> Maybe String