diff --git a/doc/effective_go.html b/doc/effective_go.html
index e3f3124631f..bbd7f24d483 100644
--- a/doc/effective_go.html
+++ b/doc/effective_go.html
@@ -1580,7 +1580,7 @@ if attended[person] { // will be false if person is not in the map
 <p>
 Sometimes you need to distinguish a missing entry from
 a zero value.  Is there an entry for <code>"UTC"</code>
-or is that the empty string because it's not in the map at all?
+or is that 0 because it's not in the map at all?
 You can discriminate with a form of multiple assignment.
 </p>
 <pre>