diff --git a/2014/endoh1/Makefile b/2014/endoh1/Makefile
index 0c2ffc48b..96ff15351 100644
--- a/2014/endoh1/Makefile
+++ b/2014/endoh1/Makefile
@@ -176,6 +176,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
+	${RM} -f main.c treacle.c
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \