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-rw-r--r--src/GF/Grammar/PrGrammar.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/GF/Grammar/PrGrammar.hs b/src/GF/Grammar/PrGrammar.hs
index 905eb39f4..4c35089f3 100644
--- a/src/GF/Grammar/PrGrammar.hs
+++ b/src/GF/Grammar/PrGrammar.hs
@@ -219,6 +219,7 @@ instance Print Atom where
prt (AtV i) = prt i
prt (AtL s) = s
prt (AtI i) = show i
+ prt (AtF i) = show i
prt_ (AtC (_,f)) = prt f
prt_ a = prt a