diff --git a/Makefile b/Makefile
index 0142d43..30a0943 100644
--- a/Makefile
+++ b/Makefile
@@ -42,5 +42,5 @@ $(pages): public/%.html: %.md | public/
 	lowdown -m filename=$(basename $@) -s --template default.html > $@
 
 .PHONY: clean
-clean:
+clean: ## Remove generated files.
 	$(RM) $(targets)