diff --git a/2012/endoh2/README.md b/2012/endoh2/README.md
index b1310dd52..c34c5d088 100644
--- a/2012/endoh2/README.md
+++ b/2012/endoh2/README.md
@@ -47,7 +47,7 @@ Yeah, "Again".  Sorry.  But I don't feel guilty or uncomfortable.
 
 This entry is based on 'over-used themes' such as self reproducing
 program and [pi](https://en.wikipedia.org/wiki/Pi) or
-[e](https://en.wikipedia.org/wiki/E_(mathematical_constant() computation.  I
+[e](https://en.wikipedia.org/wiki/E_(mathematical_constant)) computation.  I
 know you're tired of them.
 
 But have you ever seen them **all-in-one**?
diff --git a/2012/endoh2/index.html b/2012/endoh2/index.html
index 219b758d7..d2d7be638 100644
--- a/2012/endoh2/index.html
+++ b/2012/endoh2/index.html
@@ -421,7 +421,7 @@ machine</a> emulation?</p>
 <p>Yeah, “Again”. Sorry. But I don’t feel guilty or uncomfortable.</p>
 <p>This entry is based on ‘over-used themes’ such as self reproducing
 program and <a href="https://en.wikipedia.org/wiki/Pi">pi</a> or
-<a href="https://en.wikipedia.org/wiki/E_(mathematical_constant(">e</a> computation. I
+<a href="https://en.wikipedia.org/wiki/E_(mathematical_constant)">e</a> computation. I
 know you’re tired of them.</p>
 <p>But have you ever seen them <strong>all-in-one</strong>?</p>
 <h3 id="what-it-is">What it is</h3>