diff --git a/Text/TeXMath/Parser.hs b/Text/TeXMath/Parser.hs
--- a/Text/TeXMath/Parser.hs
+++ b/Text/TeXMath/Parser.hs
@@ -240,7 +240,7 @@
   , ("vmatrix", matrixWith "\x2223" "\x2223")
   , ("Vmatrix", matrixWith "\x2225" "\x2225")
   , ("split", align)
-  , ("multiline", gather)
+  , ("multline", gather)
   , ("gather", gather)
   , ("gathered", gather)
   ]
diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,3 +1,8 @@
+texmath (0.6.6.1)
+
+  * Support \multline (previously it was mispelled "multiline")
+  * Changed data-files to extra-source-files.
+
 texmath (0.6.6)
 
   * Insert braces around macro expansions to prevent breakage (#7).
diff --git a/texmath.cabal b/texmath.cabal
--- a/texmath.cabal
+++ b/texmath.cabal
@@ -1,5 +1,5 @@
 Name:                texmath
-Version:             0.6.6
+Version:             0.6.6.1
 Cabal-Version:       >= 1.6
 Build-type:          Custom
 Synopsis:            Conversion of LaTeX math formulas to MathML or OMML.