diff --git a/Sd1/swd1.xml b/Sd1/swd1.xml
index 816b7cc45eb926b4202c6f1dc534b3339bea0291..1831818537f6b6ee9e56a83098645c8fec313495 100644
--- a/Sd1/swd1.xml
+++ b/Sd1/swd1.xml
@@ -8984,7 +8984,7 @@ public interface Set_String {
   </chapter>
 
   <chapter xml:id="sd1Map2">
-    <title>Collections: Maps I</title>
+    <title>Collections: Maps II</title>
 
     <figure xml:id="sd1FigTownsByCountry">
       <title>Grouping towns by country names</title>