diff --git a/1988/isaak/README.md b/1988/isaak/README.md
index cfd2fa08b..a667cbf36 100644
--- a/1988/isaak/README.md
+++ b/1988/isaak/README.md
@@ -4,8 +4,8 @@
     make all
 ```
 
-There is an alternate version, the original, that can't be compiled in modern
-systems but can be if you have an old enough compiler. See [Alternate
+There is an alternate version, based on the original, that can be compiled in
+modern systems but likely won't do anything. See [Alternate
 code](#alternate-code) below.
 
 
diff --git a/1988/isaak/index.html b/1988/isaak/index.html
index ca3f937fd..c36df51c7 100644
--- a/1988/isaak/index.html
+++ b/1988/isaak/index.html
@@ -446,8 +446,8 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <!-- BEFORE: 1st line of markdown file: 1988/isaak/README.md -->
 <h2 id="to-build">To build:</h2>
 <pre><code>    make all</code></pre>
-<p>There is an alternate version, the original, that can’t be compiled in modern
-systems but can be if you have an old enough compiler. See <a href="#alternate-code">Alternate
+<p>There is an alternate version, based on the original, that can be compiled in
+modern systems but likely won’t do anything. See <a href="#alternate-code">Alternate
 code</a> below.</p>
 <h2 id="to-use">To use:</h2>
 <pre><code>    ./isaak</code></pre>