diff --git a/makefile b/makefile
index 484222f..b31cd25 100644
--- a/makefile
+++ b/makefile
@@ -156,4 +156,5 @@ perlcritic:
 	perlcritic *.pl doc/*.pl
 
 astyle:
-	astyle --options=astylerc $(OBJECTS:.o=.c) tommath*.h demo/*.c etc/*.c mtest/mtest.c
+	@echo "   * run astyle on all sources"
+	@astyle --options=astylerc --formatted $(OBJECTS:.o=.c) tommath*.h demo/*.c etc/*.c mtest/mtest.c