diff --git a/code/Makefile b/code/Makefile
index f919be257..2e3042eb7 100644
--- a/code/Makefile
+++ b/code/Makefile
@@ -12,6 +12,7 @@ CFLAGS += -Wextra
 CFLAGS += -D_FILE_OFFSET_BITS=64
 
 run: leak.o
+	ulimit -n $(shell ulimit -n -H)
 	./leak.o
 
 %.o: %.c