diff --git a/lojbanParser.cabal b/lojbanParser.cabal
--- a/lojbanParser.cabal
+++ b/lojbanParser.cabal
@@ -2,7 +2,7 @@
 cabal-version:	>= 1.8
 
 name:		lojbanParser
-version:	0.1.9
+version:	0.1.9.1
 stability:	experimental
 author:		.iocikun.juj. <PAF01143@nifty.ne.jp>
 maintainer:	.iocikun.juj. <PAF01143@nifty.ne.jp>
diff --git a/src/Preprocess.hs b/src/Preprocess.hs
--- a/src/Preprocess.hs
+++ b/src/Preprocess.hs
@@ -15,6 +15,8 @@
 wordsToString [] = ""
 wordsToString (("zoi", s1) : (q, s2) : rest) =
 	"zoi" ++ s1 ++ " \NUL" ++ s2 ++ quoteInside q rest
+wordsToString (("la'o", s1) : (q, s2) : rest) =
+	"la'o" ++ s1 ++ " \NUL" ++ s2 ++ quoteInside q rest
 wordsToString ((w, s) : rest) = w ++ s ++ wordsToString rest
 
 quoteInside :: String -> [(String, String)] -> String
