diff --git a/iris_c/Makefile b/iris_c/Makefile
index b8b0ef1..97d48d3 100644
--- a/iris_c/Makefile
+++ b/iris_c/Makefile
@@ -4,7 +4,7 @@ TARGET = main
 
 .PHONY: all clean
 
-all: $(TARGET)
+all: clean $(TARGET)
 
 $(TARGET): main.c random.c random.h
 	$(CC) $(CFLAGS) -o $@ main.c random.c