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-rw-r--r--src/GF/Speech/CFGToFiniteState.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/GF/Speech/CFGToFiniteState.hs b/src/GF/Speech/CFGToFiniteState.hs
index e1ee48610..872de48d0 100644
--- a/src/GF/Speech/CFGToFiniteState.hs
+++ b/src/GF/Speech/CFGToFiniteState.hs
@@ -63,7 +63,7 @@ cfgToFA opts s = minimize $ compileAutomaton start $ makeSimpleRegular s
where start = getStartCatCF opts s
makeSimpleRegular :: StateGrammar -> CFRules
-makeSimpleRegular = makeRegular . removeIdenticalRules . removeEmptyCats . cfgToCFRules
+makeSimpleRegular = makeRegular . removeIdenticalRules . bottomUpFilter . cfgToCFRules
--
-- * Approximate context-free grammars with regular grammars.