diff --git a/Makefile b/Makefile
index aee8bfc..f2f5768 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ install: build install-data install-docs install-examples install-manpages
 	install -c -m 755 bin/retro-unu $(DESTDIR)$(PREFIX)/bin/retro-unu
 	install -c -m 755 bin/retro-describe $(DESTDIR)$(PREFIX)/bin/retro-describe
 	install -c -m 755 bin/retro-document $(DESTDIR)$(PREFIX)/bin/retro-document
-	install -c -m 755 example/retro-tags.forth $(DESTDIR)$(PREFIX)/bin/retro-tags
+	install -c -m 755 example/retro-tags.retro $(DESTDIR)$(PREFIX)/bin/retro-tags
 
 install-strip: build install-data install-docs install-examples
 	install -m 755 -d -- $(DESTDIR)/bin
@@ -42,7 +42,7 @@ install-strip: build install-data install-docs install-examples
 	install -c -m 755 -s bin/retro-unu $(DESTDIR)$(PREFIX)/bin/retro-unu
 	install -c -m 755 bin/retro-describe $(DESTDIR)$(PREFIX)/bin/retro-describe
 	install -c -m 755 bin/retro-document $(DESTDIR)$(PREFIX)/bin/retro-document
-	install -c -m 755 example/retro-tags.forth $(DESTDIR)$(PREFIX)/bin/retro-tags
+	install -c -m 755 example/retro-tags.retro $(DESTDIR)$(PREFIX)/bin/retro-tags
 
 install-data:
 	install -m 755 -d -- $(DESTDIR)$(DATADIR)
diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 755008e..9fde19c 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -14,6 +14,7 @@
 ## Documentation
 
 - correct example for retro-compiler
+- add notes on retro-tags
 
 ## Toolchain
 
diff --git a/doc/book/Additional-Tools b/doc/book/Additional-Tools
index 0bfd0e3..6f0256e 100644
--- a/doc/book/Additional-Tools
+++ b/doc/book/Additional-Tools
@@ -44,13 +44,17 @@ Pass the image name as the first argument, and then file names
 as susequent ones. Do *not* use this for things relying on I/O
 apart from the basic console output as it doesn't emulate other
 devices. If you need to load in things that rely on using the
-optional I/O devices, see the Advanced Builds chapter.
+optional I/O devices, see the **Advanced Builds** chapter.
 
 ## retro-muri
 
 This is the assembler for Nga. It's used to build the initial
 RETRO kernel and can be used by other tools as well.
 
+## retro-tags
+
+TBD
+
 ## retro-unu
 
 This is the literate source extraction tool for RETRO. It