fix format of document
diff --git a/readme.md b/readme.md
index a7dee31..6ae2e78 100644
--- a/readme.md
+++ b/readme.md
@@ -97,7 +97,7 @@
 The omitted destination syntax as the following ss disabled.
 ```
     vaddps(xmm2, xmm3); // xmm2 <- xmm2 + xmm3
-``
+```
 define `XBYAK_ENABLE_OMITTED_OPERAND` if you use it for backward compatibility.
 But the newer version will not support it.