diff --git a/Makefile b/Makefile
index ea8fcd4..0da7fb8 100644
--- a/Makefile
+++ b/Makefile
@@ -112,9 +112,6 @@ advent-$(VERS).tar.gz: $(SOURCES) $(DOCS)
 	(tar -T MANIFEST -czvf advent-$(VERS).tar.gz)
 	@(rm advent-$(VERS))
 
-indent:
-	astyle -n -A3 --pad-header --min-conditional-indent=1 --pad-oper *.c
-
 release: advent-$(VERS).tar.gz advent.html history.html hints.html notes.html
 	shipper version=$(VERS) | sh -e -x