diff --git a/Manuals/Texinfo/Introduction/chapter.texinfo b/Manuals/Texinfo/Introduction/chapter.texinfo
index f147a59..de11d5f 100644
--- a/Manuals/Texinfo/Introduction/chapter.texinfo
+++ b/Manuals/Texinfo/Introduction/chapter.texinfo
@@ -1,6 +1,6 @@
 @node Introduction
 @chapter Introduction
 @cindex Introduction
-@include Introduction/chapter-intro.texi
-@include Introduction/chapter-menu.texi
-@include Introduction/chapter-nodes.texi
+@include Introduction/chapter-intro.texinfo
+@include Introduction/chapter-menu.texinfo
+@include Introduction/chapter-nodes.texinfo