1 files changed, 1 insertions, 0 deletions
diff --git a/faraday/Makefile b/faraday/Makefile
index 2e68bf4..0a84c81 100644
--- a/faraday/Makefile
+++ b/faraday/Makefile
@@ -26,6 +26,7 @@ $(RESULTS): results/% : tasks/%
 	./task_solver.m $< $@
 
 clean:
+	rm -f problems_prepared.stamp
 	rm -rf tasks
 	rm -rf results