1 files changed, 4 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 61cd769..3be3369 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CC=cc
 CFLAGS=-std=c1x -W -Wall -g
 LDFLAGS=
-EXEC=01 02 03
+EXEC=01 02 03 04
 
 all: $(EXEC)
 
@@ -14,6 +14,9 @@ all: $(EXEC)
 03: input.o 03.o
 	$(CC) -o $@ $> $(LDFLAGS)
 
+04: input.o 04.o
+	$(CC) -o $@ $> $(LDFLAGS)
+
 .c.o:
 	$(CC) -o $@ -c $< $(CFLAGS)