diff --git a/data/tools/Makefile b/data/tools/Makefile
index 3dd4f01d8dd..afe15f5a5d4 100644
--- a/data/tools/Makefile
+++ b/data/tools/Makefile
@@ -106,4 +106,5 @@ revert:
 	./wmllint --revert $(MAINLINE) $(UMC)
 clean:
 	./wmllint --clean $(MAINLINE) $(UMC)
+	rm -f macro-reference.html