diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,3 +1,7 @@
+texmath (0.12.5.2)
+
+  * Fix bug in implementation of `\mspace` (#195).
+
 texmath (0.12.5.1)
 
   * Compile texmath-server with `-threaded`.
diff --git a/src/Text/TeXMath/Readers/TeX.hs b/src/Text/TeXMath/Readers/TeX.hs
--- a/src/Text/TeXMath/Readers/TeX.hs
+++ b/src/Text/TeXMath/Readers/TeX.hs
@@ -655,8 +655,7 @@
   (ERoot <$> inbrackets <*> texToken) <|> (ESqrt <$> texToken)
 
 xspace :: Text -> TP Exp
-xspace "\\mspace" = do
-  ctrlseq "mspace"
+xspace "\\mspace" =
   braces $ do
     len <- many1 digit
     lexeme $ string "mu"
diff --git a/texmath.cabal b/texmath.cabal
--- a/texmath.cabal
+++ b/texmath.cabal
@@ -1,5 +1,5 @@
 Name:                texmath
-Version:             0.12.5.1
+Version:             0.12.5.2
 Cabal-Version:       >= 1.10
 Build-type:          Simple
 Synopsis:            Conversion between math formats.