diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 8bdd26ce28..f04e57246d 100644
--- a/doc/src/sgml/Makefile
+++ b/doc/src/sgml/Makefile
@@ -331,6 +331,7 @@ endif
 installdirs:
 	$(MKDIR_P) '$(DESTDIR)$(htmldir)'/html $(addprefix '$(DESTDIR)$(mandir)'/man, 1 3 $(sqlmansectnum))
 
+# If the install used a man directory shared with other applications, this will remove all files.
 uninstall:
 	rm -f '$(DESTDIR)$(htmldir)/html/'* $(addprefix  '$(DESTDIR)$(mandir)'/man, 1/* 3/* $(sqlmansectnum)/*)