diff --git a/Docs/src/build.bat b/Docs/src/build.bat
index 9a249027..99d77127 100644
--- a/Docs/src/build.bat
+++ b/Docs/src/build.bat
@@ -1,4 +1,4 @@
-bin\halibut.exe config.but intro.but usage.but script.but attributes.but compilerflags.but sections.but basic.but registry.but generalpurpose.but flowcontrol.but file.but misc.but string.but stack.but int.but reboot.but uninstall.but log.but sec.but functions.but labels.but var.but usection.but callback.but compiler.but defines.but plugin.but history.but license.but
+bin\halibut.exe config.but intro.but usage.but script.but attributes.but compilerflags.but sections.but basic.but registry.but generalpurpose.but flowcontrol.but file.but misc.but string.but stack.but int.but reboot.but uninstall.but log.but sec.but functions.but labels.but var.but usection.but callback.but compiler.but defines.but plugin.but history.but license.but modernui.but
 @del *.hlp
 @del *.cnt
 @copy Contents.html index.html
diff --git a/Docs/src/modernui.but b/Docs/src/modernui.but
new file mode 100644
index 00000000..24155eb0
--- /dev/null
+++ b/Docs/src/modernui.but
@@ -0,0 +1,4 @@
+\A{modernui} Modern User Interface
+
+Use the NSIS Modern User Interface to give your installers a modern look.
+For more info, see \W{../Contrib/Modern UI/Readme.html}{Modern UI Readme}.
\ No newline at end of file