diff --git a/Text/TeXMath/OMML.hs b/Text/TeXMath/OMML.hs
--- a/Text/TeXMath/OMML.hs
+++ b/Text/TeXMath/OMML.hs
@@ -30,7 +30,10 @@
 toOMML dt = container . concatMap showExp
             . everywhere (mkT $ handleDownup dt)
     where container = case dt of
-                  DisplayBlock  -> mnode "oMathPara" . mnode "oMath"
+                  DisplayBlock  -> \x -> mnode "oMathPara"
+                                    [ mnode "oMathParaPr"
+                                      $ mnodeA "jc" "center" ()
+                                    , mnode "oMath" x ]
                   DisplayInline -> mnode "oMath"
 
 mnode :: Node t => String -> t -> Element
diff --git a/tests/01.omml b/tests/01.omml
--- a/tests/01.omml
+++ b/tests/01.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/02.omml b/tests/02.omml
--- a/tests/02.omml
+++ b/tests/02.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/03.omml b/tests/03.omml
--- a/tests/03.omml
+++ b/tests/03.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/04.omml b/tests/04.omml
--- a/tests/04.omml
+++ b/tests/04.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:sSub>
       <m:e>
diff --git a/tests/05.omml b/tests/05.omml
--- a/tests/05.omml
+++ b/tests/05.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:nary>
       <m:naryPr>
diff --git a/tests/06.omml b/tests/06.omml
--- a/tests/06.omml
+++ b/tests/06.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:nary>
       <m:naryPr>
diff --git a/tests/07.omml b/tests/07.omml
--- a/tests/07.omml
+++ b/tests/07.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/08.omml b/tests/08.omml
--- a/tests/08.omml
+++ b/tests/08.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/09.omml b/tests/09.omml
--- a/tests/09.omml
+++ b/tests/09.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:limLow>
       <m:e>
diff --git a/tests/10.omml b/tests/10.omml
--- a/tests/10.omml
+++ b/tests/10.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:sSub>
       <m:e>
diff --git a/tests/11.omml b/tests/11.omml
--- a/tests/11.omml
+++ b/tests/11.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:sSub>
       <m:e>
diff --git a/tests/12.omml b/tests/12.omml
--- a/tests/12.omml
+++ b/tests/12.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/13.omml b/tests/13.omml
--- a/tests/13.omml
+++ b/tests/13.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:sSub>
       <m:e />
diff --git a/tests/14.omml b/tests/14.omml
--- a/tests/14.omml
+++ b/tests/14.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:f>
       <m:fPr>
diff --git a/tests/15.omml b/tests/15.omml
--- a/tests/15.omml
+++ b/tests/15.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:f>
       <m:fPr>
diff --git a/tests/16.omml b/tests/16.omml
--- a/tests/16.omml
+++ b/tests/16.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/17.omml b/tests/17.omml
--- a/tests/17.omml
+++ b/tests/17.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/18.omml b/tests/18.omml
--- a/tests/18.omml
+++ b/tests/18.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/19.omml b/tests/19.omml
--- a/tests/19.omml
+++ b/tests/19.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:d>
       <m:dPr>
diff --git a/tests/axiom_of_power_set.omml b/tests/axiom_of_power_set.omml
--- a/tests/axiom_of_power_set.omml
+++ b/tests/axiom_of_power_set.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/binomial_coefficient.omml b/tests/binomial_coefficient.omml
--- a/tests/binomial_coefficient.omml
+++ b/tests/binomial_coefficient.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr>
diff --git a/tests/complex_number.omml b/tests/complex_number.omml
--- a/tests/complex_number.omml
+++ b/tests/complex_number.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/deMorgans_law.omml b/tests/deMorgans_law.omml
--- a/tests/deMorgans_law.omml
+++ b/tests/deMorgans_law.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/differentiable_manifold.omml b/tests/differentiable_manifold.omml
--- a/tests/differentiable_manifold.omml
+++ b/tests/differentiable_manifold.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:sSub>
       <m:e>
diff --git a/tests/divergence.omml b/tests/divergence.omml
--- a/tests/divergence.omml
+++ b/tests/divergence.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/ensuremath.omml b/tests/ensuremath.omml
--- a/tests/ensuremath.omml
+++ b/tests/ensuremath.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:sSup>
       <m:e>
diff --git a/tests/macros.omml b/tests/macros.omml
--- a/tests/macros.omml
+++ b/tests/macros.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/moore_determinant.omml b/tests/moore_determinant.omml
--- a/tests/moore_determinant.omml
+++ b/tests/moore_determinant.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/quadratic_formula.omml b/tests/quadratic_formula.omml
--- a/tests/quadratic_formula.omml
+++ b/tests/quadratic_formula.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/schwinger_dyson.omml b/tests/schwinger_dyson.omml
--- a/tests/schwinger_dyson.omml
+++ b/tests/schwinger_dyson.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:d>
       <m:dPr>
diff --git a/tests/sophomores_dream.omml b/tests/sophomores_dream.omml
--- a/tests/sophomores_dream.omml
+++ b/tests/sophomores_dream.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:nary>
       <m:naryPr>
diff --git a/tests/sphere_volume.omml b/tests/sphere_volume.omml
--- a/tests/sphere_volume.omml
+++ b/tests/sphere_volume.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/tests/unicode.omml b/tests/unicode.omml
--- a/tests/unicode.omml
+++ b/tests/unicode.omml
@@ -1,5 +1,8 @@
 <?xml version='1.0' ?>
 <m:oMathPara>
+  <m:oMathParaPr>
+    <m:jc m:val="center" />
+  </m:oMathParaPr>
   <m:oMath>
     <m:r>
       <m:rPr />
diff --git a/texmath.cabal b/texmath.cabal
--- a/texmath.cabal
+++ b/texmath.cabal
@@ -1,5 +1,5 @@
 Name:                texmath
-Version:             0.6
+Version:             0.6.0.1
 Cabal-Version:       >= 1.6
 Build-type:          Custom
 Synopsis:            Conversion of LaTeX math formulas to MathML or OMML.
